This is not factorable. You would have to do the quadratic formula for this problem.
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=3x * * * * * The correct answer is: x2 + 7x + 12 = (x + 3)(x + 4).
(x + 10)(x - 3)
(x - y + 7)(x + y)
(x2 plus 40) (x minus 1)
x2 + 7x = 2x2 + 6 x2 - 2x2 + 7x = 6 -x2 +7x - 6 = 0 or alternatively x2 - 7x + 6 = 0