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3 years ago

Which factoring method would be best to factor x^2 - 9?

Mathematics

1 answer:

Vinil7 [7]3 years ago

8 0

Answer:

D. difference of squares

Step-by-step explanation:

Both of the terms x^2 and 9 are squares, so their difference is the difference of squares. The factorization of that is a "special form" that can be usefully memorized.

a^2 -b^2 = (a -b)(a +b)

x^2 -9 = (x -3)(x +3)

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