Khan Academy
Khan Academy: Pre Calculus: Exponential Form to Find Complex Roots
This video illustrates how the exponential form of a complex number can be helpful in finding the complex roots of a number. The process is shown both algebraically and graphically using x^3 = 1 as a simple example. [11:53]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Solving Percent Problems 2
This video shows how to find what percentage one number is of another. Practice problems are available. [4:37]
Khan Academy
Khan Academy: Algebra: Descartes and Cartesian Coordinates
Video explaining the contributions of Rene Decartes to Algebra and Geometry. [11:22]
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Khan Academy: Calculus: 2011 Calculus Ab Free Response #5A
Video shows how to rewrite a differential equation as a derivative of a function and then use it to find the slope of the tangent line to a function at a given point. The tangent line is then used to estimate a future value of the...
Khan Academy
Khan Academy: Geometry: Ca Geometry: Exterior Angles
Demonstrates solutions to problems #41-45 of California Geometry released state test questions. Problems address finding volumes of rectangular prisms, exterior angles, interior angle sum, and exterior angle sum. [10:53]
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Khan Academy: Algebra: New Operator Definitions
This video demonstrates how to evaluate expressions when a symbol is given rather than an addition, subtraction, multiplication or division sign. It provides four examples and utilizes variable substitution. Practice problems available....
Khan Academy
Khan Academy: Algebra: Evaluating Exponential Expressions 2
Video evaluating an exponential expression using the order of operations. Includes a zero exponent. [3:01]
Khan Academy
Khan Academy: Differential Equations: Laplace Transform to Solve Nonhomogeneous
Video shows using the Laplace transform to solve a second order linear nonhomogeneous differential equation. [18:48]
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Khan Academy: Algebra: Factoring Trinomials With a Leading 1 Coefficient
Video demonstrates how to factor a trinomial with a leading coefficient of 1 and positive b and c terms using the factor by grouping method. Practice problems available. [4:12]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding Integers With Different Signs
This video introduces and demonstrates the concept of addition of integers using a number line. Practice problems are available. [5:32]
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Khan Academy: Linear Algebra: Determinant and Area of a Parallelogram
Video demonstrating that the area of a parallelogram created by graphing the column vectors of a 2x2 matrix is the equivalent to the absolute value of the determinant of the matrix. Pythagorean theorem, in conjunction with calculating a...
Khan Academy
Khan Academy: Linear Algebra: Determinants Along Other Rows/cols
A video lesson describing how the determinants for larger matrices can be found using cofactor expansion on any row or column. Illustrates that it is helpful to choose rows or columns with zeros in order to simplify the computations....
Khan Academy
Khan Academy: Differential Equations: Repeated Roots of Characteristic Equations
Video shows what happens when the characteristic equation has repeated roots. Explains why just using the one root will not give a correct general equation. Shows an example of solving a differential equation where the characteristic...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Decimals and Fractions
This video shows how to convert a decimal to a simplified fraction. Practice problems are available. [2:42]
Khan Academy
Khan Academy: Biology: Role of Phagocytes in Innate or Nonspecific Immunity
An explanation of the part the inflammatory response within the immune system. [16:20]
Khan Academy
Khan Academy: Economics: Medicare Sustainability
How is medicare funded? An astonishing video presentation explaining the medicare trust and how it could be depleted within the next 10 years. [7:52]
Khan Academy
Khan Academy: Statistics: Mean and Variance of Bernoulli Distribution Example
Video giving example of a Bernoulli distribution and showing how to calculate its mean, variance, and standard deviation leading up to deriving the formulas for mean, variance and standard deviation of a Bernoulli distribution which will...
Khan Academy
Khan Academy: Biology: Anatomy of a Neuron
The anatomy of a neuron is explained. [6:13]
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Khan Academy: Linear Algebra: Inverting Matrices (Part 3)
Video shows how to determine the inverse of a 3 by 3 matrix using the Gauss-Jordan elimination method. This video also appears in the strand Algebra: Matrices. [13:35]
Khan Academy
Khan Academy: Algebra: Mixture Problems 2
This video demonstrates how to solve a mixture problem by setting up and solving a system of equations. [6:43]
Khan Academy
Khan Academy: Algebra: Exponent Properties 3
Video simplifying an algebraic expression using the power of a power and product of a power rules. [2:35]
Khan Academy
Khan Academy: Biology: Ape Clarification
A clarification on the evolution and natural selection video regarding apes having no tails. [1:04]
Khan Academy
Khan Academy: Differential Equations: Laplace Transform 1
Video explains what the Laplace transform is, shows its notation and gives an example of using the Laplace transform. [8:01]
Khan Academy
Khan Academy: Algebra: Change of Base Formula
Demonstrates how to use the change of base formula to evaluate a given logarithm and proves the change of base formula. [7:32]