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13 June, 08:46

Solve for x in the equation x^2 + 4x - 4 = 8

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Answers (2)
  1. 13 June, 09:01
    0
    Subtracting 8 from both sides of the equation gives

    x^2 + 4x - 12 = 0

    (x + 6) (x - 2) = 0

    x = - 6, 2 answer
  2. 13 June, 09:07
    0
    x^2+4x-4=8

    Subtract 8 from both sides: x^2+4x-4-8=8-8

    Simplify: x^2+4x-12=0

    Solve with the quadratic formula: For a=1, b=4, c=-12: x1,2 = - 4 + - (4^2-4*1 (-12)) sqrt over 2*1

    x = 2 and x=-6
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