TÌM X SAO CHO ( X − 2 ) (3+ 2 X + 1 )3− 9 ( X + 1 )3 = − 16

Bài 2. Tìm x sao cho

( x 2 ) (

3

+ 2 x + 1 )

3

9 ( x + 1 )

3

= − 16