How did this factorization come to be? 8x^2\, +\, 6x\, -\, 9\, =\, 0 (4x\, -\, 3)(2x\, +\, 3)\, =\, 0 I see where 4x and 2x came from, and I under stand that -3*3=-9 for the C position, but how did the 6 get there in the B position? Isn't it supposed to be what you get when you add -...