Let p be a prime such that p is congruent to 3 modulo 4 and let a be a quadratic residue modulo p. Prove that if ab is congruent to p-1 modulo p, then b is a quadratic non-residue modulo p.

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- April 24th 2010, 06:03 AMTandQuadratic Residue Proof
Let p be a prime such that p is congruent to 3 modulo 4 and let a be a quadratic residue modulo p. Prove that if ab is congruent to p-1 modulo p, then b is a quadratic non-residue modulo p.

- April 24th 2010, 10:32 AMchiph588@