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x2 + 8x + 12 = (x + 6) (x + 2)
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(x + 6)(x + 2)
8x - 9 = 11x + 12 8x = 11x + 21 -3x = 21 x = -7
2(x + 3)(x + 1)
8x + x = 9x
3x-3x+4x^2+8x=4x^2+8x
(8x + 3)2 ie (8x + 3)(8x + 3)