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17 February, 22:56

Find the roots of the quadratic equation y=x^2+7x-18 by factoring

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  1. 18 February, 00:28
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    X^2+7x-18=0

    x^2+9x-2x-18=0 (splitting middle term)

    x (X+9) - 2 (x+9) = 0

    (x-2) * (X+9) = 0

    Therefore, X=+2 or - 9
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