1.

x2-3x-28 3x-49 172

Answer»

x*x-3x-28 = (x-7)(x+4) x*x-49 = (x-7)(x+7) x*x-3x-28 / x*x-49 = (x-7)(x+4)/(x+7)(x-7) =x+4 / x+7 so x+4 / x+7 =3/17 17x+68=3x+21 14x=-47 so x=-47/14

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