\(3x-6y+2y^2-xy\)
\(=\left(3x-xy\right)-\left(6y-2y^2\right)\)
\(=x\left(3-y\right)-2y\left(3-y\right)\)
\(=\left(3-y\right)\left(x-2y\right)\)
\(3x-6y+2y^2-xy\)
\(=\left(3x-6y\right)+\left(2y^2-xy\right)\)
\(=3.\left(x-2y\right)+y.\left(2y-x\right)\)
\(=3.\left(x-2y\right)-y.\left(x-2y\right)\)
\(=\left(x-2y\right).\left(3-y\right).\)
Chúc bạn học tốt!