Question

rút gọn

4x\(^3\)-(x\(^2\)-1).( 2x+3)+2x .( x\(^2\)- 2)

Answer 1

\(4x^3-\left(x^2-1\right).\left(2x+3\right)+2x.\left(x^2-2\right)\)

\(=4x^3-\left(2x^3+3x^2-2x-3\right)+2x^3-4x\)

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

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

Answer 2

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

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