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13 January, 13:02

How do you expand the following?

(X+8) (x-8)

+1
Answers (2)
  1. 13 January, 16:01
    0
    x^2-64

    Step-by-step explanation:

    (x+8) (x-8)

    = (x+8) (x+-8)

    = (x) (x) + (x) (-8) + (8) (x) + (8) (-8)

    =x^2-8x+8x-64

    =x^2-64
  2. 13 January, 16:28
    0
    Use the Foil method, x*x = x^2, 8x-8x = 0, 8 * (-8) = - 64, so the answer is x^2-64!
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