Question

Rút gọn : -3x ( 2x + 1 ) + ( 2x - 1 ) ( 3x + 2 )

Answer 1

Answer 2

Ta có: \(-3x\left(2x+1\right)+\left(2x-1\right)\left(3x+2\right)\)

\(=-6x^2-3x+6x^2+4x-3x-2\)

\(=-2x-2\)

Answer 3

\(-3x\left(2x+1\right)+\left(2x-1\right)\left(3x+2\right)\)

\(=-6x^2-3x+6x^2+x-2\)

\(=-2x-2\)