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21-08-2018
Mathematics

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

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Shaswat221005 Shaswat221005

21-08-2018

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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