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10 May, 23:08

5x 2 -320 factored completely?

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Answers (2)
  1. 10 May, 23:23
    0
    First factor out the 5 so you have 5 (x2-64). Since (a+b) (a-b) = (a^2-b^2)

    (x^2-64) = (x-8) (x+8). So completely factored is 5 (x-8) (x+8).
  2. 10 May, 23:25
    0
    First take out the GCF (5)

    5 (x^2-64)

    It's a perfect square so we can go further

    5 (x+8) (x-8)
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