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6 September, 17:57

Solve the following quadratic equation by the square root property of equality.

2 (x + 7) 2 = 64

+4
Answers (2)
  1. 6 September, 18:26
    0
    2 (x+7) ^2 = 64

    2 (x+7) = + 8/-8

    2 (x+7) = (+8) 2 (x+7) = (-8)

    x+7 = (+4) x+7 = (-4)

    x = (+4) - 7 x = (-4) - 7

    x = - 3 x = - 11
  2. 6 September, 21:19
    0
    2 (x+7) ^2 = 64

    1 divide both sides by 2

    (x+7) ^2 = 32

    2 root both sides

    x+7 = 4 * sqrt2

    x = 4*sqrt2 - 7
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