Question

x(x+2)+x(x-3)-3(x+2)

Phân tích đa thức thành nhân tử

Answer 1

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

Answer 2

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

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

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