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2 September, 02:09

Factor completely 2x2 - 2x - 40

A. 2 (x - 5) (x + 4)

B. (2x - 10) (x + 4)

C. (x - 5) (2x + 8)

D. 2 (x - 4) (x + 5)

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Answers (1)
  1. 2 September, 02:28
    0
    2 (x-5) (x+4)

    Step-by-step explanation:

    2x^2 - 2x - 40

    Factor out a 2

    2 (x^2 - x - 20)

    What 2 numbers multiply to - 20 and add to - 1

    -5*4 = - 20

    -5+4 = - 1

    2 (x-5) (x+4)
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