well, x^2-y^2 = (x+y)(x-y)
so ...
what is x square - y square over x + y
3 answers
I mean x raise to power 2- y raise power 2 divided by x+y
so, now you have
(x+y)(x-y) / (x+y)
NOW do you see?
(x+y)(x-y) / (x+y)
NOW do you see?