3x3 - x2y + 12x - 4y = x2*(3x - y) + 4*(3x - y) = (x2 + 4)*(3x - y)
As written, that's 3x^3 - 12x which factors to 3x(x - 2)(x + 2)
3x(x2 + 2x - 4)
-2x+12x+28=10x+28 ;Combining like factors2(5x+14) ; Factor out a two from both of them
30+12x = 6(5+2x)
x2 + 12x + 32 = (x + 8)(x + 4)
x2 + 12x + 32 = (x + 4)(x + 8)
(x + 4)(x + 8)
(x + 10)(x + 2)
3x
x2-12x+35 = (x-5)(x-7)
2(3x^2 + 6x + 2)