9x 2 4x 2 0 July 8, 2019 16 32 64 128 9x 2 24x 0 4x 4 9x 2 2 0 4x 7 2 9x 2 0 4x 4 4x 3 9x 2 x 2 0 2x 9 9x 2 − 4 = 0
