View all English videos

Khan Academy isiXhosa

I-Khan Academy ngumanyano ozibona enobizo. Injongo ye-Khan Academy ayiyokuba yenze imali - yeyokuba yenze utshintsho oluhle kwimfundo elizweni kwaye yenze ukuba wonke umntu naphi na akwazi ufikelela kwimfundo ekumngangatho ophezulu njengowelizwe jikelele. Ngaphandle kwezi zisezantsi, ezinye i-video ezizoqobo ziyafumaneka kwinxuwa ye-Khan Academy. Ukufumana ii-video ezinawo namagama wolandela, yiya kwelinxuwa: www.khanacademy.org/contribute

Ukuba ufuna ukuzidibanisa nalento yenzwa yi-Khan Academy, yiya ku http://international.khanacademy.org

Inguqulo yezi-video usuka kwiSilungu uyotsho kwisiXhosa uyiphathelwe yiYunivesithi yaseKapa idibane no-Numeric kwaye no-ClickMaths.

Advocate: Adrian Cox
Email: info@clickmaths.org

Geometry: Worked Examples

Special properties and parts of triangles

Limits

Sequences and induction

Probability and combinatorics

  • Trig identities and examples

    Congruent triangles

  • Perimeter, area and volume

    Right triangles

    Basic Trigonometry

  • Angles and intersecting lines

  • Ratios and rational expressions

  • Quadratics

  • Factoring quadratic expressions Example 4: Factoring by grouping Example: Complex roots for a quadratic
    Examples: Factoring simple quadratics Example 5: Factoring by grouping Discriminant of Quadratic Equations
    Example 1: Factoring quadratic expressions Example 6: Factoring by grouping Discriminant for Types of Solutions for a Quadratic
    Example 1: Solving a quadratic equation by factoring Example: Roots and vertex of a parabola Quadratic Equation part 2
    Example 2: Solving a quadratic equation by factoring Example: Parabola vertex and axis of symmetry Quadratic Formula (proof)
    Example 3: Solving a quadratic equation by factoring Examples: Graphing and interpreting quadratics CA Algebra I: Quadratic Equation
    Example 4: Solving a quadratic equation by factoring Applying Quadratic Functions 1 CA Algebra I: Quadratic Roots
    Example: Graphing a quadratic Applying Quadratic Functions 2 Quadratic Inequalities
    Example 1: Factoring trinomials with a common factor Parabola Focus and Directrix 1 Quadratic Inequalities (visual explanaition)
    Factoring Special Products Introduction to the quadratic equation Focus and Directrix of a Parabola 2
    Example 1: Factoring difference of squares CA Algebra I: Completing the Square Solving Quadratic Equations by Square Roots
    Example 2: Factoring difference of squares Algebra II: Quadratics and Shifts Example: Solving simple quadratic
    Example: Factoring perfect square trinomials Solving a quadratic by factoring Solving Quadratic Equations by Completing the Square
    Example: Factoring a fourth degree expression CA Algebra I: Factoring Quadratics Completing the square (old school)
    Example: Factoring special products Example: Quadratics in standard form Example: Completing perfect square trinomials
    Factor by Grouping and Factoring Completely Proof of Quadratic Formula Example 1: Completing the square
    Graphs of Quadratic Functions Example 1: Using the quadratic formula Example 2: Completing the square
    Example: Basic grouping Example 2: Using the quadratic formula Example 3: Completing the square
    Example 1: Factoring by grouping Example 3: Using the quadratic formula Example 4: Completing the square
    Example 2: Factoring by grouping Example 4: Applying the quadratic formula Example 5: Completing the square
    Example 3: Factoring by grouping Example 5: Using the quadratic formula How to Use the Quadratic Formula
  • Factoring quadratic expressions
    Examples: Factoring simple quadratics
    Example 1: Factoring quadratic expressions
    Example 1: Solving a quadratic equation by factoring
    Example 2: Solving a quadratic equation by factoring
    Example 3: Solving a quadratic equation by factoring
    Example 4: Solving a quadratic equation by factoring
    Example: Graphing a quadratic
    Example 1: Factoring trinomials with a common factor
    Factoring Special Products
    Example 1: Factoring difference of squares
    Example 2: Factoring difference of squares
    Example: Factoring perfect square trinomials
    Example: Factoring a fourth degree expression
    Example: Factoring special products
    Factor by Grouping and Factoring Completely
    Graphs of Quadratic Functions
    Example: Basic grouping
    Example 1: Factoring by grouping
    Example 2: Factoring by grouping
    Example 3: Factoring by grouping
    Example 4: Factoring by grouping
    Example 5: Factoring by grouping
    Example 6: Factoring by grouping
    Example: Roots and vertex of a parabola
    Example: Parabola vertex and axis of symmetry
    Examples: Graphing and interpreting quadratics
    Applying Quadratic Functions 1
    Applying Quadratic Functions 2
    Parabola Focus and Directrix 1
    Introduction to the quadratic equation
    CA Algebra I: Completing the Square
    Algebra II: Quadratics and Shifts
    Solving a quadratic by factoring
    CA Algebra I: Factoring Quadratics
    Example: Quadratics in standard form
    Proof of Quadratic Formula
    Example 1: Using the quadratic formula
    Example 2: Using the quadratic formula
    Example 3: Using the quadratic formula
    Example 4: Applying the quadratic formula
    Example 5: Using the quadratic formula
    Example: Complex roots for a quadratic
    Discriminant of Quadratic Equations
    Discriminant for Types of Solutions for a Quadratic
    Quadratic Equation part 2
    Quadratic Formula (proof)
    CA Algebra I: Quadratic Equation
    CA Algebra I: Quadratic Roots
    Quadratic Inequalities
    Quadratic Inequalities (visual explanaition)
    Focus and Directrix of a Parabola 2
    Solving Quadratic Equations by Square Roots
    Example: Solving simple quadratic
    Solving Quadratic Equations by Completing the Square
    Completing the square (old school)
    Example: Completing perfect square trinomials
    Example 1: Completing the square
    Example 2: Completing the square
    Example 3: Completing the square
    Example 4: Completing the square
    Example 5: Completing the square
    How to Use the Quadratic Formula
  • Logarithms

    Graphing points, equations and inequalities

  • Systems of equations and inequalities

  • Problem Solving Word Problems 2 Solving Systems of Equations by Elimination Example 1: Solving systems by substitution
    Overtaking Word Problem Solving Linear Systems by Substitution Example 3: Solving systems by substitution
    Passing Trains Solving Linear Systems by Graphing The Substitution Method
    Passed Bike Word Problem Solving the Troll Riddle Visually Substitution Method 2
    Two Passing Bicycles Word Problem Trolls, Tolls, and Systems of Equations Testing a solution for a system of equations
    Officer on Horseback Talking bird solves systems with substitution Graphing Systems of Equations
    Systems and rate problems 3 Practice using substitution for systems Graphical Systems Application Problem
    Systems and rate problems 2 Systems with Elimination Practice Example 2: Graphically Solving Systems
    Systems and rate problems How many bags of potato chips do people eat? Example 3: Graphically Solving systems
    Mixture problems 3 Simple Elimination Practice Example 1: Solving systems by elimination
    Mixture problems 2 Solving Systems Graphically Example 2: Solving systems by elimination
    Mixture problems 1 Inconsistent systems of equations Addition Elimination Method 1
    Example 4: Solving a word problem with substitution Infinite solutions to systems Addition Elimination Method 2
    Special Types of Linear Systems Consistent and Inconsistent Systems Addition Elimination Method 3
    Old video on system of equations Independent and Dependent Systems Addition Elimination Method 4
    Solving Systems of Equations by Multiplication Practice thinking about number of solutions to systems Example 3: Solving systems by elimination
    King's Cupcakes: Solving Systems by Elimination Example 2: Solving systems by substitution
  • Problem Solving Word Problems 2
    Overtaking Word Problem
    Passing Trains
    Passed Bike Word Problem
    Two Passing Bicycles Word Problem
    Officer on Horseback
    Systems and rate problems 3
    Systems and rate problems 2
    Systems and rate problems
    Mixture problems 3
    Mixture problems 2
    Mixture problems 1
    Example 4: Solving a word problem with substitution
    Special Types of Linear Systems
    Old video on system of equations
    Solving Systems of Equations by Multiplication
    King's Cupcakes: Solving Systems by Elimination
    Solving Systems of Equations by Elimination
    Solving Linear Systems by Substitution
    Solving Linear Systems by Graphing
    Solving the Troll Riddle Visually
    Trolls, Tolls, and Systems of Equations
    Talking bird solves systems with substitution
    Practice using substitution for systems
    Systems with Elimination Practice
    How many bags of potato chips do people eat?
    Simple Elimination Practice
    Solving Systems Graphically
    Inconsistent systems of equations
    Infinite solutions to systems
    Consistent and Inconsistent Systems
    Independent and Dependent Systems
    Practice thinking about number of solutions to systems
    Example 2: Solving systems by substitution
    Example 1: Solving systems by substitution
    Example 3: Solving systems by substitution
    The Substitution Method
    Substitution Method 2
    Testing a solution for a system of equations
    Graphing Systems of Equations
    Graphical Systems Application Problem
    Example 2: Graphically Solving Systems
    Example 3: Graphically Solving systems
    Example 1: Solving systems by elimination
    Example 2: Solving systems by elimination
    Addition Elimination Method 1
    Addition Elimination Method 2
    Addition Elimination Method 3
    Addition Elimination Method 4
    Example 3: Solving systems by elimination
  • Introduction to algebra

  • Polynomials

  • Adding and subtracting polynomials 1 Square a Binomial Algebraic Long Division
    Adding and subtracting polynomials 2 Subtracting polynomials Algebra II: Simplifying Polynomials
    Adding and subtracting polynomials 3 Terms coefficients and exponents in a polynomial Multiplication of Polynomials
    Adding polynomials Multiplying Monomials Multiplying Binomials
    Dividing Monomials Terms coefficients and exponents in a polynomial Multiplying Polynomials1
    Evaluate a polynomial at a given value Dividing Monomials Multiplying Polynomials 2
    Evaluating a Polynomial at a given value Interesting Polynomial Coefficient Problem Square a Binomial
    Example: Adding polynomials with multiple variables Multiplying and Dividing Monomials 1 Special Products of Binomials
    Factoring and the Distributive Property Polynomials 2 Special Polynomials Products 1
    Factoring and the Distributive Property 2 Multiplying and Dividing Monomials 3 Multiplying Monomials by Polynomials
    Monomial Greatest Common Factor Addition and Subtraction of Polynomials Multipyling polynomials
    More multiplying polynomials Subtracting polynomials with multiple variables Multiplying Polynomials 3
    Multiply Polynomials1 Polynomial Division More Multiplying Polynomials
    Multiplying and Dividing Monomials 1 Polynomial divided by monomial Multiplying and Dividing Monomials 2
    Multiplying and Dividing Monomials 2 Dividing multivariable polynomial with monomial Monomial Greatest Common Factor
    Multiplying and Dividing Monomials 3 Dividing polynomials 1 Factoring and the Distributive Property
    Multiplying Monomials Dividing polynomials with remainders Factoring and the Distributive Property 2
    Multiplying Monomials by Polynomials Synthetic Division Factoring and the Distributive Property 3
    Polynomials 1 Synthetic Division Example 2 Multiplying Binomials with Radicals
    Polynomials 2 Why Synthetic division works Factor polynomials using the GCF
    Simplify a polynomial Factoring Sum of Cubes Special Products of Polynomials 1
    Special Polynomials Products 1 Difference of Cubes Factoring Special Products of Polynomials 2
  • Adding and subtracting polynomials 1
    Adding and subtracting polynomials 2
    Adding and subtracting polynomials 3
    Adding polynomials
    Dividing Monomials
    Evaluate a polynomial at a given value
    Evaluating a Polynomial at a given value
    Example: Adding polynomials with multiple variables
    Factoring and the Distributive Property
    Factoring and the Distributive Property 2
    Monomial Greatest Common Factor
    More multiplying polynomials
    Multiply Polynomials1
    Multiplying and Dividing Monomials 1
    Multiplying and Dividing Monomials 2
    Multiplying and Dividing Monomials 3
    Multiplying Monomials
    Multiplying Monomials by Polynomials
    Polynomials 1
    Polynomials 2
    Simplify a polynomial
    Special Polynomials Products 1
    Square a Binomial
    Subtracting polynomials
    Terms coefficients and exponents in a polynomial
    Multiplying Monomials
    Terms coefficients and exponents in a polynomial
    Dividing Monomials
    Interesting Polynomial Coefficient Problem
    Multiplying and Dividing Monomials 1
    Polynomials 2
    Multiplying and Dividing Monomials 3
    Addition and Subtraction of Polynomials
    Subtracting polynomials with multiple variables
    Polynomial Division
    Polynomial divided by monomial
    Dividing multivariable polynomial with monomial
    Dividing polynomials 1
    Dividing polynomials with remainders
    Synthetic Division
    Synthetic Division Example 2
    Why Synthetic division works
    Factoring Sum of Cubes
    Difference of Cubes Factoring
    Algebraic Long Division
    Algebra II: Simplifying Polynomials
    Multiplication of Polynomials
    Multiplying Binomials
    Multiplying Polynomials1
    Multiplying Polynomials 2
    Square a Binomial
    Special Products of Binomials
    Special Polynomials Products 1
    Multiplying Monomials by Polynomials
    Multipyling polynomials
    Multiplying Polynomials 3
    More Multiplying Polynomials
    Multiplying and Dividing Monomials 2
    Monomial Greatest Common Factor
    Factoring and the Distributive Property
    Factoring and the Distributive Property 2
    Factoring and the Distributive Property 3
    Multiplying Binomials with Radicals
    Factor polynomials using the GCF
    Special Products of Polynomials 1
    Special Products of Polynomials 2
  • Exponent Expressions and Equations

  • Linear Inequalities

    Functions

  • Linear equations

  • Algebraic expression - least common multiple Example: Evaluating an expression Algebra: Linear Equations 3
    Converting Repeating Decimals to Fractions 1 Expression with two variables Algebra: Linear Equations 4
    Converting Repeating Decimals to Fractions 2 What is a variable Averages
    Absolute Value Equations Example 1 Why aren't we using the multiplication sign Taking percentages
    Absolute Value Equations Example 2 Combining like terms More percent problems
    Absolute Value Equations 1 Combining Like Terms 1 Age word problems 1
    Absolute Inequalities 2 Combining Like Terms 2 Age word problems 2
    Absolute Value Equations 1 Combining Like Terms 3 Age word problems 3
    Absolute Inequalities 2 Combining like terms and the distributive property Growing by a percentage
    Absolute Value Inequalities Example 3 Combining like terms and the distributive property Another percent example
    Absolute Value Inequalities Converting Repeating Decimals to Fractions 1 Ex 1 Multi step equation
    Absolute Value Inequalities Example 1 Ex 2 Age word problem Ex 2 Multi-step equation
    Absolute Value Equations Percent Problems Solving Equations with the Distributive Property
    Another Percent Word Problem Converting Repeating Decimals to Fractions 2 Solving equations with the distributive property 2
    Solving for a Variable 2 Ex 3 Age word problem Ex 2: Distributive property to simplify
    Basic Linear Equation Word Problem Example: Solving for a variable Ex 3: Distributive property to simplify
    Equation Special Cases Ex 1 Age word problem Basic Rate Problems
    Example 1: Variables on both sides Variables Expressions and Equations Early Train Word Problem
    Example 2: Variables on both sides Simple Equations Patterns in Sequences 1
    Rearrange formulas to isolate specific variables Solving One-Step Equations Patterns in Sequences 2
    Solving for a Variable Solving One-Step Equations 2 Equations of Sequences Patterns
    Variables on Both Sides One Step Equations Finding the 100th Term in a Sequence
    Algebraic Expression Least Common Multiple Two-Step Equations Challenge example: Sum of integers
    Evaluating exponential expressions 2 Solving Ax+B = C Integer sums
    Example: Evaluating expressions with 2 variables Example: Dimensions of a garden 2003 AIME II Problem 1
    Example: Evaluate a formula using substitution Example: Two step equation with x/4 term Bunch of examples
    Examples of evaluating variable expressions Algebra: Linear Equations 1 Evaluating expressions where individual variable values are unknown
    Examples of evaluating variable expressions Algebra: Linear Equations 2 Evaluating expressions with unknown variables 2
  • Algebraic expression - least common multiple
    Converting Repeating Decimals to Fractions 1
    Converting Repeating Decimals to Fractions 2
    Absolute Value Equations Example 1
    Absolute Value Equations Example 2
    Absolute Value Equations 1
    Absolute Inequalities 2
    Absolute Value Equations 1
    Absolute Inequalities 2
    Absolute Value Inequalities Example 3
    Absolute Value Inequalities
    Absolute Value Inequalities Example 1
    Absolute Value Equations
    Another Percent Word Problem
    Solving for a Variable 2
    Basic Linear Equation Word Problem
    Equation Special Cases
    Example 1: Variables on both sides
    Example 2: Variables on both sides
    Rearrange formulas to isolate specific variables
    Solving for a Variable
    Variables on Both Sides
    Algebraic Expression Least Common Multiple
    Evaluating exponential expressions 2
    Example: Evaluating expressions with 2 variables
    Example: Evaluate a formula using substitution
    Examples of evaluating variable expressions
    Examples of evaluating variable expressions
    Example: Evaluating an expression
    Expression with two variables
    What is a variable
    Why aren't we using the multiplication sign
    Combining like terms
    Combining Like Terms 1
    Combining Like Terms 2
    Combining Like Terms 3
    Combining like terms and the distributive property
    Combining like terms and the distributive property
    Converting Repeating Decimals to Fractions 1
    Ex 2 Age word problem
    Percent Problems
    Converting Repeating Decimals to Fractions 2
    Ex 3 Age word problem
    Example: Solving for a variable
    Ex 1 Age word problem
    Variables Expressions and Equations
    Simple Equations
    Solving One-Step Equations
    Solving One-Step Equations 2
    One Step Equations
    Two-Step Equations
    Solving Ax+B = C
    Example: Dimensions of a garden
    Example: Two step equation with x/4 term
    Algebra: Linear Equations 1
    Algebra: Linear Equations 2
    Algebra: Linear Equations 3
    Algebra: Linear Equations 4
    Averages
    Taking percentages
    More percent problems
    Age word problems 1
    Age word problems 2
    Age word problems 3
    Growing by a percentage
    Another percent example
    Ex 1 Multi step equation
    Ex 2 Multi-step equation
    Solving Equations with the Distributive Property
    Solving equations with the distributive property 2
    Ex 2: Distributive property to simplify
    Ex 3: Distributive property to simplify
    Basic Rate Problems
    Early Train Word Problem
    Patterns in Sequences 1
    Patterns in Sequences 2
    Equations of Sequences Patterns
    Finding the 100th Term in a Sequence
    Challenge example: Sum of integers
    Integer sums
    2003 AIME II Problem 1
    Bunch of examples
    Evaluating expressions where individual variable values are unknown
    Evaluating expressions with unknown variables 2
  • Exponents, radicals, and scientific notation

  • Ratios, proportions, units and rates

    Fractions

  • Adding and subtracting fractions Comparing Fractions 2 Multiplying Fractions Word Problem
    Adding fractions (ex 1) Comparing improper fractions and mixed numbers Multiplying Mixed Numbers
    Adding fractions examples Converting Mixed Numbers to Improper Fractions Number Sets
    Adding fractions with different signs Dividing fractions Number Sets 1
    Adding Fractions with Like Denominators Dividing Fractions Example Number Sets 2
    Adding Fractions with Unlike Denominators Dividing Fractions Word Problem Number Sets 3
    Adding Mixed Numbers Dividing Mixed Numbers Numerator and Denominator of a Fraction
    Adding Mixed Numbers with Unlike Denominators Dividing Mixed Numbers and Fractions Ordering Fractions
    Adding Mixed Numbers Word Problem Equivalent fractions Ordering improper fractions and mixed numbers
    Adding subtracting mixed numbers 0.5 (ex 1) Equivalent Fractions Example Proper and Improper Fractions
    Adding subtracting mixed numbers 0.5 (ex 2) Finding Common Denominators Reciprocal of a Mixed Number
    Adding subtracting mixed numbers 1 (ex 1) Fractions in lowest terms Subtracting Fractions
    Adding subtracting mixed numbers 1 (ex 2) Identifying Fraction Parts Subtracting Mixed Numbers
    Addition and Subtraction with Significant Figures Mixed numbers and improper fractions Subtracting Mixed Numbers 2
    Changing a mixed number to an improper fraction Multiplying Fractions Subtracting Mixed Numbers Word Problem
    Changing an improper fraction to a mixed number Multiplying Fractions and Mixed Numbers comparing fractions
    Multiplying Fractions and Mixed Numbers
  • Adding and subtracting fractions
    Adding fractions (ex 1)
    Adding fractions examples
    Adding fractions with different signs
    Adding Fractions with Like Denominators
    Adding Fractions with Unlike Denominators
    Adding Mixed Numbers
    Adding Mixed Numbers with Unlike Denominators
    Adding Mixed Numbers Word Problem
    Adding subtracting mixed numbers 0.5 (ex 1)
    Adding subtracting mixed numbers 0.5 (ex 2)
    Adding subtracting mixed numbers 1 (ex 1)
    Adding subtracting mixed numbers 1 (ex 2)
    Addition and Subtraction with Significant Figures
    Changing a mixed number to an improper fraction
    Changing an improper fraction to a mixed number
    comparing fractions
    Comparing Fractions 2
    Comparing improper fractions and mixed numbers
    Converting Mixed Numbers to Improper Fractions
    Dividing fractions
    Dividing Fractions Example
    Dividing Fractions Word Problem
    Dividing Mixed Numbers
    Dividing Mixed Numbers and Fractions
    Equivalent fractions
    Equivalent Fractions Example
    Finding Common Denominators
    Fractions in lowest terms
    Identifying Fraction Parts
    Mixed numbers and improper fractions
    Multiplying Fractions
    Multiplying Fractions and Mixed Numbers
    Multiplying Fractions and Mixed Numbers
    Multiplying Fractions Word Problem
    Multiplying Mixed Numbers
    Number Sets
    Number Sets 1
    Number Sets 2
    Number Sets 3
    Numerator and Denominator of a Fraction
    Ordering Fractions
    Ordering improper fractions and mixed numbers
    Proper and Improper Fractions
    Reciprocal of a Mixed Number
    Subtracting Fractions
    Subtracting Mixed Numbers
    Subtracting Mixed Numbers 2
    Subtracting Mixed Numbers Word Problem
  • Factors and multiples

    Multiplication and division

  • Negative numbers and absolute value

  • Addition and subtraction

    Decimals and percent