2x 1 2 9x2 0 July 8, 2019 16 32 64 128 9 2x 1 2 4 x 1 2 0 2 2x 3 9 * 2 x 1 0 solve 2 2x 3 9 2 x 1 0 2 2x 1 9 * 2 x 2 1 0 B 2x 1 2 9x2 0 2x 9
