(3x + 4)(x - 2)
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3x2 + 2x - 8 = 3x2 + 6x - 4x - 8 = 3x(x+2) - 4(x+2) = (3x-4)*(x+2)
-(3x - 4)(x - 2)
It is: (-3x-4)(x+2) when factored
While it is possible to factor 3x2 from both of these and get 3x2(4 - 1), it's a lot easier to subtract 3x2 from 12x2 and get 9x2
4x + 2y = -8 → 2y = -4x - 8 → y = -2x - 4