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22 August, 11:03

Solve the equation by completing the square. round to the nearest hundredth if necessary. x^2+2x=8

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  1. 22 August, 12:36
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    x² + 2x = 8

    x² + 2x - 8 = 8 - 8

    x² + 2x - 8 = 0

    x² - 2x + 4x - 8 = 0

    x (x) - x (2) + 4 (x) - 4 (2) = 0

    x (x - 2) + 4 (x - 2) = 0

    (x + 4) (x - 2) = 0

    x + 4 = 0 U x - 2 = 0

    - 4 - 4 + 2 + 2

    x = - 4 x = 2
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