Question

Phan tich thanh nhan tu
x^2 - y - y^2 - x

Answer 1

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

Answer 2

x² - y - y² - x

= (x² - y²) - x - y

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

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