9x 2 8x 2 0 July 8, 2019 16 32 64 128 9x 2 a 2 x 2 8x 16 a 2 0 15x 3 8x 2 9x 2 0 2x 4 9x 3 8x 2 9x 2 0 9 x 8 = 2x 9