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28 March, 16:46

Complete the square x^2+6x=12

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  1. 28 March, 17:48
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    (x + 3) ^2 = 21.

    Step-by-step explanation:

    x^2 + 6x = 12

    6 / 2 = 3 so we have:

    x^2 + 6x = (x + 3) ^2 - 9 so:

    (x + 3) ^2 - 9 = 12

    (x + 3) ^2 = 21.
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