If , show that are even.

I know I have to classify squares mod 8, but can someone show me how.

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- Apr 15th 2009, 09:36 AMSally_Mathsum of 4 squares
If , show that are even.

I know I have to classify squares mod 8, but can someone show me how. - Apr 15th 2009, 10:26 AMThePerfectHacker