x³+8x²-2x-16 Factor x² out of the first two terms: x³+8x² becomes x²(x+8) x²(x+8)-2x-16 Factor -2 out of the last two terms: -2x-16 becomes -2(x+8) x²(x+8)-2(x+8) Factor out (x+8) (x+8)(x²-2) Edwin
