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12 September, 05:03

How can solve this. (X-2) (x+4)

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Answers (2)
  1. 12 September, 05:49
    0
    Inmultesti pe rand cu fiecare : x*x+x*4-2*x-2*4=x²+4x-2x-8=x²+2x-8
  2. 12 September, 08:56
    0
    To expand

    X times X = X^2

    -2 times X = - 2X (add this to 4X to equal 2X)

    4 times X = 4X

    -2 times 4 = - 8

    X^2 + 2X - 8

    To solve when equation = 0

    X = + 2 or - 4
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