5 x 9 )= 6 2x 4 July 8, 2019 16 32 64 128 9 2x 6 =- 3 x 5 )+ 4x 2x (- 6 4 x 5 9 )- 3 3 x 5 )+ 2 6 4x )= 2x 9 4 9x-5 2=0 68