4 4x 2 1 16x July 8, 2019 16 32 64 128 4 4x 2 )+ 1 16x 7 Solve 4 4x 2 )+ 1 16x 7 7 4x )= 1 2 4 16x )- 16 16x 4 4x 2 4x 1 factorise 4x4 = 16