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Blizzard [7]
2 years ago
11

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

Mathematics
1 answer:
Vinil7 [7]2 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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