Question

phan tich cac da thuc thanh nhan tu

 

-x - y^2 + x^2 -y

Answer 1

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

(x-y).(x+y)-(x-y).1

(x-y).(x+y-1)

Answer 2

=(x²-y²)-(x+y)

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

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

Answer 3

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

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

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

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