Question

Phân tyích đa thức thành nhân tử

x²-y²+x-y

Answer 1

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

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

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

Answer 2

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

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

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

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

Answer 3

\(x^2-y^2+x-y\\ =\left(x-y\right)\left(x+y\right)+\left(x-y\right)\\ =\left(x-y\right)\left(x+y+1\right)\)