Khan Academy: Logarithm Properties: Logarithmic Equations

Introduction to the first two logarithm properties.

Explore logarithm properties through change of base formula.

Using Multiple Logarithm Properties to Simplify

Proof of the logarithm property: log a + log b = log ab

Proofs of the logarithm properties: A(log B) = log (B^A) and log A - log B = log (A/B)

Explore logarithm properties through change of base formula proofs.

Logarithm of a Power

An exercise on solving a quadratic equation by applying the method of factoring by grouping. Begin by clicking on "show scratchpad."

This video demonstrates how to solve systems of linear equations in two variables using the elimination method. There are three sample problems shown. [9:57]

This video demonstrates how to solve an equation that contains absolute values. It also shows how to check your answer. This video also appears in the strand Algebra: Absolute Value. [3:26]