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5 December, 16:49

Which equation has the same solution as x^2 - 6x - 12 = 0?

(1) (x + 3) ^2 = 21 (3) (x + 3) ^2 = 3

(2) (x - 3) ^2 = 21 (4) (x - 3) ^2 = 3

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  1. 5 December, 20:47
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    (2)

    Because (x - 3) ^2 = x^2 - 6x + 9;

    x^2 - 6x + 9 = 21;

    x^2 - 6x - 12 = 0;
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