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Anonymous
4x + 4 or 4(x + 1)
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(x+3)(x+4) = x²+7x+12
3 plus 4 x plus 5 31 when simplified would give x = 23/4.
(x+3)(x+4)=x2+7x+12
It is: (-10)+(-3)+4 = -9
3 + 4 + 4 x 15 = 67