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Solving Equations that are Quadratic in Form

Author: Shirley Beil

The following video is being made available with closed captioning at:

http://youtu.be/q3Crq6xf9Gc

Four Examples of Equations that are Quadratic in Form

I say that the Principle of Square Roots justifies setting the factors to zero (~3:05) in the first example. I meant to say, The Principle of Zero Products.