Question

giúp mik vs giải rõ ra giúp mik vs ạ 

3x(x – y) + x – y 

Answer 1

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

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

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

Answer 2

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