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seen May 10 '12 at 3:51

Jul
5
awarded  Student
Jul
5
awarded  Scholar
Jul
5
comment A hyperbola as a constant difference of distances
Thanks, that was a big help. Totally forgot about that rationalising trick.
Jul
5
comment A hyperbola as a constant difference of distances
This was still helpful although not as detailed as the answer I accepted - I'd upvote if I could.
Jul
5
accepted A hyperbola as a constant difference of distances
Jul
5
awarded  Editor
Jul
5
comment A hyperbola as a constant difference of distances
@anon I've reworded that bit in a way that might make more sense.
Jul
5
revised A hyperbola as a constant difference of distances
added 52 characters in body
Jul
5
asked A hyperbola as a constant difference of distances