4 7x 1 3 2x 3 July 8, 2019 16 32 64 128 7x 1 4 2x 3 3 3x 5y 2 7x 3 1 2x 4 3x 4 6x )( 7x 3 )+( 2x 3 )( 5x 1 4 2x 3 )+ 7x 5 1 3x )- 17 4 x 3 2x 1 30 7x 1 5x 4 7x - 1 2x = 4 34 4 7x-2 3x 1 2x-9 3