X 4 9x 3 20x 2 July 8, 2019 16 32 64 128 X 4 9x 3 20x 2 0 X 5 2x 4 10x 3 20x 2 9x 18 X 4 4x 3 9x 2 20x 22 X 4 4x 3 9x 2 20x 20 X 4 4x 3 9x 2 20x 2043 X ^ 4 - 9x ^ 2 + 20 = 0