9 2x 27 x 1 July 8, 2019 16 32 64 128 9 2x 1 27 x 4 9 2x 1 27 x 2 9 * 81 1 2x 27 2 x 9 2x 27 x 2 1 3 9 2x 1 27 x 3 9 2x 1 81 27 x 25 9 2x 3 =( 27 125 x X 9 =( 27 x )-( 18 2x 1 81 (- x 9 2x =( 27 3x 2 9 2x 1 3 3x 1 27 x 3 1 27 2x 6 9 x 1 27 x 2 =( 1 9 2x 4