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22 September, 00:43

X (x+7) = 4 (6+4) solve for x

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  1. 22 September, 01:01
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    X (x+7) = 4 (6+4)

    x^2 + 7x = 24 + 16

    x^2 + 7x - 40 = 0

    a=1 b=7 c=-40

    Using the quadratic formula:

    x = [-7 + - sq root (49 - 4*1*-40) ] / 2*1

    x = [-7 + - sq root (209) ] / 2

    x1 = [-7 + 14.4568322948] / 2

    x1 = 3.7284161474

    x2 = [-7 - 14.4568322948] / 2

    x2 = - 10.7284161474
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