X 4 5x 3 4x 20 July 8, 2019 16 32 64 128 X 4 5x 3 4x 20 factor X 4 5x 3 4x 20 factor completely X 4 5x 3 4x 2 20x 0 G x )=- 5x 4 4x 3 20x 20 X 4 5x 3 4x 2 20x F x )= x 4 5x 3 4x 2 20x X 3 4x 2 5x 20 x 4 X 4 x 4 x 4 X - 4 3 5x = - 20
