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13 February, 10:30

Start with x2 + 4x = 12 and complete the square, what is the equivalent equation?

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  1. 13 February, 12:20
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    (x + 2) ² = 16

    Step-by-step explanation:

    Given

    x² + 4x = 12

    To complete the square

    add (half the coefficient of the x - term) ² to both sides

    x² + 2 (2) x + 4 = 12 + 4, that is

    (x + 2) ² = 16
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