Question

Phân tích đa thức thành nhân tử :

\(3m^2-2m-1\)

 

Answer 1

\(3m^2-2m-1\)

\(=3m^2-3m+m-1\)

\(=3m\left(m-1\right)+\left(m-1\right)\)

\(=\left(m-1\right)\left(3m+1\right)\)

Answer 2

\(3m^2-2m-1\)

\(=3m^2+m-3m-1\)

\(=\left(3m^2+m\right)-\left(3m+1\right)\)

\(=m\left(3m+1\right)-\left(3m+1\right)\)

\(=\left(m-1\right)\left(3m+1\right)\)