2 3 2x )- 4 3 2x 1 ) 5 July 8, 2019 16 32 64 128 2 3 2x )- 4 3 2x 1 )+ 5 2 1 2x 3 4 2x 5 )= 3 8 5x 1 2 2x 3 35 3 2x 4 A x 4 2x 3 2x 2 x 3 tại x 1 5