Question

cách làm bài : x^2y+xy^2 -x-y.

giúp mình với

Answer 1

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

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

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

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

Answer 2

x²y + xy² - x - y = x²y - x + xy² - y

= x(xy - 1) + y(xy - 1)

= (x +y) (xy - 1)