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Difference of Perfect Squares - Problem 7

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Teacher/Instructor Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

Any time you're asked to factor, your first step should be to look for a greatest common factor. After that, if you have two terms left (a binomial) with a subtraction sign (or difference,) you might have a "difference of perfect squares." If both of the terms of your binomial have square roots, then you can use the shortcut for factoring a difference of perfect squares: a^2 - b^2 = (a - b)(a + b)

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