Board Thread:Fun and Games/@comment-48285-20151005173825/@comment-25744472-20160504155637

"Also x2-y2 does not factor to (x+y)(x-y)." W.H.Y? Like,seriously...why does not it factor?!

"Also you can cancel variables, even if they end up dividing by 0" Never said I couldn't lol.

"I'm just really bored. Please don't eat me." Lucky you I'm not hungry! Don't worry man...

I just still can't see other mistakes but dividing by (x-y). If you give a clearer explanation for the first point (factoring (x2-y2) ), please.