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8 March, 17:24

Use the quadratic formula to solve 9x^2+12x+4=0

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  1. 8 March, 21:16
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    Ax²+BC+c=0

    x=-b±√b²-4ac/2a

    x=-12±√12²-4 (-9x4) / 2 (9)

    x=-12±√144+144/18

    x=-12±√288/18

    x=12±√16

    x=-12±4

    x=-12-4=-16

    x=12+4=8

    x=-16; x=8
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