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9 December, 05:15

Complete the square on the following quadratic

x^2+22x+9=0

what value is added to both sides of the equation.

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  1. 9 December, 08:19
    0
    Subtract 9 on both sides.

    Then use the formula (b/2) ^2

    (22/2) ^2 = 121

    So, factor x^2 + 22x + 121 = - 9+121

    (x+11) ^2 = 112

    X + 11 = √112

    X = √112 - 11
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