13 2x 5 8 July 8, 2019 16 32 64 128 13 2x 5 8x 7x 4x 1 13 2x 5 8x 7 *( 4x 1 2x 5 8x 13 5 2x 1 )= 13 8x 2x 5 8 x 13 2 2x 5 x 8 =- 13 4 13-2x 5
