5x 2 10x 2 =- 7 x x 2 July 8, 2019 16 32 64 128 10x 2 5x 3 )+( 7x 2 2x 7 5x 2 7x )- 1 2 10x 2 4 5x 2 7x 13 )-( 10x 2 3x 23