x^3 + 2x^2 - 16x - 32=0
(x^3+2x^2) - (16x+32)=0
x^2*(x+2)-16(x+2).=0
(x+2)*(x+4)*(x-4)=0
x1=-2, x2=-4, x3=4
x^3 + 2x^2 - 16x - 32=0
(x^3+2x^2) - (16x+32)=0
x^2*(x+2)-16(x+2).=0
(x+2)*(x+4)*(x-4)=0
x1=-2, x2=-4, x3=4