x ^ 2 %2B 7 x %2B 12 – InterviewSolution

1.	x ^ 2 %2B 7 x %2B 12
Answer» x^2 + 7x + 12 = 0x^2 + 4x + 3x + 12 = 0x(x + 4) + 3(x + 4) = 0(x + 3)(x + 4) = 0x = - 3, - 4

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