Question

phân tích đa thức thành nhân tử 

\(y\left(x-y\right)^2+xy\left(x-y\right)\)

Answer 1

\(y\left(x-y\right)^2+xy\left(x-y\right)\)

\(=\left(xy-y^2\right)\left(x-y\right)+xy\left(x-y\right)\)

\(=\left(xy-y^2+xy\right)\left(x-y\right)\)

\(=\left(2xy-y^2\right)\left(x-y\right)\)

Answer 2

y ( x - y)² + xy ( x-y) = (x - y) [(x-y) y +xy]

= (x-y) ( 2xy -y²)