Question

Simplify

y²- x² - (x² - y²) =​

Answer 1

2(y-x)(y+x)

Step-by-step explanation:

(y²- x² )- (x² - y²)

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

=(x+y){y-x-x+y}

=(x+y)(2y-2x)

=2(y-x)(y+x)