5x 1 3 (- 6x 9 July 8, 2019 16 32 64 128 3 2 5x 1 )= 3 6x 9 4 4 1 5x )= 9 3 6x 5 5x 1 6x 3 7x 9 5x 3 6x 8 9x 1 =- 3x 5 x 5 x 5 x 5 x 5