Question

phân thức đa thức thành nhân tử b,x^2 - y^2 + x-y

Answer 1

= (x-y)(x+y) +x-y

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

Answer 2

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

Answer 3

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

Answer 4

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