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15 August, 05:07

X^2+8x+12=0. Solve using quadratic formula

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  1. 15 August, 05:25
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    D = b^2-4ac, thus D = 64 - 4*12 = 16

    Now is x = - b + - sqrt (D) / 2a, or x = - 8 + - sqrt (16) / 2, giving respectively - 2 and - 6

    So x = - 2 or x = - 6
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