I give back to you and all other friends that equation solution..
I've gotten "efficient" (some asses might label it "lazy") in my old age and have zero tolerance for time-wasting school stuff when I have a grander goal to achieve.
So, this URL confirms Ichan's plotting skills:http://www.wolframalpha.com/input/?i=plot+%28x%C2%B2+%2B+y%C2%B2+-1%29%C2%B3+-+x%C2%B2y%C2%B3+%3D+0
For those still in school, this site ^ will do your math homework for you, kids. Use it, you'll be stupid, but stupid and useless with an "A"