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a^2+b^2=m^2-n^2, ab=2mn

Source: 2016 Korea Winter Program Test2 Day1 #1

January 25, 2016
number theory proposedDiophantine equationnumber theory

Problem Statement

Solve: a,b,m,nNa, b, m, n\in \mathbb{N} a2+b2=m2n2,ab=2mna^2+b^2=m^2-n^2, ab=2mn