x^2-y^2=(x-y)(x+y)=6643; x,y€N
Пусть x-y=1 => x=y+1 => x+y=2y+1 => 1(2y+1)=6643 => 2y=6642 => y=3321 => x=3322
6643=3322^2-3321^2
x^2-y^2=(x-y)(x+y)=6643; x,y€N
Пусть x-y=1 => x=y+1 => x+y=2y+1 => 1(2y+1)=6643 => 2y=6642 => y=3321 => x=3322
6643=3322^2-3321^2