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4th - Video 2: Another example of factoring difference of squares.

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4th - Video 2: Another example of factoring difference of squares.

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Factoring difference of squares: two variables (example 2)

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3rd - Video 1: Factoring a Difference of Squares

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3rd - Video 1: Factoring a Difference of Squares

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Factoring difference of squares: two variables

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If we expand (a+b)(a-b) we will get a²-b². Factorization goes the other way: suppose we have an expression that is the difference of two squares, like x²-25 or 49x²-y², then we can factor is using the roots of those squares. For example, x²-25 can be factored as (x+5)(x-5).

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Show all work and check by multiplication.

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Tues. May 9