This 14-minute video lesson uses Gauss-Jordan elimination to invert a 3x3 matrix. …

An introduction to slightly more complicated equations.

How to solve equations with the variable on both sides of the …

Demonstration of solving linear equations with variable expressions in the deominators of …

This 17-minute video lesson uses the inverse of a matrix to solve …

This 14-minute video lesson uses matrices to figure out if some combination …

This 14-minute video lesson shows how to multiply two 2x2 matrices.

This 15-minute video lesson provides more on multiplying matrices.

A demonstration of how to solve an advanced ratio problem with algebra.

This is a presentation of slightly harder percent problems.

This 3-minute video lesson looks at more rational exponents and exponent laws.

This 4-minute video lesson explains how to multiply and simplify a radical …

This 3-minute video lesson explains how to multiply and simplify a radical …

This shows how a mathematician can define their own set of operators.

A fun algebraic problem.

This lesson introductes systems of equations.

A word problem involving 3 people overtaking each other at different rates.

This lesson explains how a parabola is the locus of all points …

This lesson explains how a parabola is the locus of all points …

An introduction to partial fraction expansion.