difference of perfect squares 134 videos

Rectangle and Square Properties
Geometry Polygons
How to define a rectangle and a square.
equiangular polygon congruent diagonals bisect regular quadrilateral angle bisectors 
Deccimal Approximations of Square Roots
PreAlgebra Decimals and Percents
Finding decimal approximations of square roots without a calculator

Finding the Vertex of a Parabola by Completing the Square
Algebra 2 Quadratic Equations and Inequalities
How to find the vertex of a parabola.
vertex form completing the square parabola 
Finding the Vertex of a Parabola by Completing the Square
Precalculus Equations of Lines, Parabolas and Circles
How to find the vertex of a parabola.
vertex form completing the square parabola 
The Inverse of a Square Matrix
Precalculus Systems of Linear Equations and Matrices
How to determine whether two matrices are inverses.
matrices square matrices the identity matrix matrix multiplication invertible inverse matrix 
A More Perfect Union
AP US History AP US History Videos
Trace the impact of the Supreme Court from early federalist government through Jacksonian Democracy.
John Marshall Supreme Court presidential power regionalism 
Solving an Equation with Radicals
Algebra 2 Roots and Radicals
How to solve an equation with a square root.
radical equation squaring both sides 
Perimeter
Geometry Geometry Building Blocks
How to define perimeter and calculate it for squares, rectangles, and circles.
perimeter of a square rectangle and circle 
Overview of the Different Methods of Solving a Quadratic Equation
Algebra 2 Quadratic Equations and Inequalities
How to know which method to use when solving a quadratic equation.
factoring square root property completing the square quadratic formula pros cons comparison 
Square Matrices
Precalculus Systems of Linear Equations and Matrices
How to determine whether two matrices can be multiplied, and if so, what the dimensions of the product will be.
matrices rows columns dimension matrix multiplication 
2x2 Determinants
Precalculus Systems of Linear Equations and Matrices
How to compute the determinant of a 2x2 square matrix.
square matrices determinant 2x2 determinant 
Introduction to Radicals
Algebra 2 Roots and Radicals
How to know when to include a plus and minus on a square root problem.
simplifying square roots 
The Cosine Addition Formulas
Precalculus Advanced Trigonometry
How to derive the cosine of a difference formula.
the unit circle the law of cosines the distance formula cosine of a difference formula 
The Cosine Addition Formulas
Trigonometry Advanced Trigonometry
How to derive the cosine of a difference formula.
the unit circle the law of cosines the distance formula cosine of a difference formula 
Pythagorean Theorem Proofs
Geometry Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square.
right triangle area of a square binomial squared area of a triangle side leg hypotenuse 
Pythagorean Theorem Proofs
Trigonometry Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square.
right triangle area of a square binomial squared area of a triangle side leg hypotenuse 
Ohm's Law
Physics Electricity
How to use Ohm's law to relate potential difference and current flow.
ohm's law electric current potential difference 
Solving Exponential Equations with the Different Bases
Algebra 2 Inverse, Exponential and Logarithmic Functions
Solving an exponential equation by taking the log of both sides.
exponential function log of both sides