X x 5 )-( 4 x 2 7x 1 July 8, 2019 16 32 64 128 Tìm x biết x x 5 )-( 4 x 2 7x 1 X 4 )-( x 2 )+( 4x 5 )-( 7x 10 X 5 4x 4 x 3 7x 1 )/( x 2 4x x 5 )- 7x x 4 )+ 3x 2 12 4 3 x 2 )+ x 5 x 1 )- 7x 7x 4 2 x 5 )= 8 x 1 1 x 2 x 2 x 2 x 2 7x 10 2x 4 x 5