# Math Help - Law of quadratic reciprocity1

1. ## Law of quadratic reciprocity1

Let p and q be odd prime numbers with p=4q+1. Prove that (q over p) =1 where (q over p) denotes the legendre symbol.

2. Originally Posted by mndi1105
Let p and q be odd prime numbers with p=4q+1. Prove that (q over p) =1 where (q over p) denotes the legendre symbol.
Since $p\equiv 1(\bmod 4)$ it means $(p/q)=(q/p)$.