(x+2)(x-3)(x+8)=(x-2)(x+4)(x+5)(x^2-x-6)(x+8)=(x^2+2x-8)(x+5)x^3+7x^2-14x-48=x^3+7x^2+2x-40-14x-48=2x-4016x=-8x=-1/2
