Question

Решите систему:
ху(х + у) = 6
ху (х – у ) = 2

Answer 1

ху=6/(х+у)
6(х-у)/(х+у)=2
6х-6у=2х+2у
4х=8у
х=8у/4=2у
2у^2=6/3у
6у^3=6
у^3=6/6=1
у=1
х=2×1=2