X 3 8x 2 16x 5 July 8, 2019 16 32 64 128 X 3 8x 2 7x 2 16x 56x 112 X 5 2x 4 x 3 8x 2 16x 8 0 X 4 8x 3 18x 2 16x 5 (x ^ 2 - 16)/(8x ^ 3) * (4x)/(x + 4)