2 3 8x x 5 6 July 8, 2019 16 32 64 128 X 2 8x 3 )( x 2 8x 5 )= 63 (- 2x 2 5 )( x 3 8x 6 27 54x 36x 2 8x 3 tại x 6 5 2 8 x 3 5 2 5+3/8x x
