If x*x + 2x - 35 = 0, then x = ?
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x*x + 2x - 35
= x^2 + 2x - 35
= x^2 +7x - 5x - 35
= x(x+7) - 5(x+7)
= (x+7)(x-5)
x = -7 and 5
= x^2 + 2x - 35
= x^2 +7x - 5x - 35
= x(x+7) - 5(x+7)
= (x+7)(x-5)
x = -7 and 5
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