In this video, Salman Khan of Khan Academy explains completing the square.
Khan Academy

This video includes sample exercises and stepbystep explanations of polynomial factoring and multiplication for the California Standards Test.
Khan Academy

Excellent site showing examples of algebra, trig, calculus, differential equations, and linear algebra.
Paul's Online Math Notes

Quiz on Polynomials, Factoring, and Exponential Expressions
SOS Math

Interactive Worksheets for practicing factoring of trinomials
AlgebraHelp.com

Some worked example problems that point out many common errors students make when solving them.
Pauls Online Math Notes

How to find zeroes of polynomials, using the "Rational Roots Theorem" and synthetic division. Written description with examples.
Paul's Online Math Notes

The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ....
SOS math

In this Early Edge video lesson, you'll learn more about Simplifying Polynomials, so you can be successful when you take on highschool Math & Algebra.
The Princeton Review

In this Early Edge video lesson, you'll learn more about Simplifying Monomials, so you can be successful when you take on highschool Math & Algebra.
The Princeton Review
