CK-12 Foundation
Ck 12: Algebra: Zero Product Principle
[Free Registration/Login may be required to access all resource tools.] Use the Zero Product Principle to solve polynomial equations.
Windstream
Ojk's Precalculus Study Page: Solving Polynomial Equations
A comprehensive look at the three main ways to find the roots of a polynomial: factoring, formulas, and the rational root theorem.