Prove that if n=2 (mod 3) then it cannot be a square.

No idea where to start with this one. Any pointers please?

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- July 20th 2008, 11:35 AMfree_to_flyHelp on proving this statement...
Prove that if n=2 (mod 3) then it cannot be a square.

No idea where to start with this one. Any pointers please? - July 20th 2008, 11:44 AMMoo
- July 20th 2008, 11:47 AMThePerfectHacker