Одн x<>0 y <>0 x <>2y x <>-2y
(x^2×y^2+x^2-4y^2)=14/15xy (x+2y)
(x^2-4y^2+x^2×y^2)=14/3 xy (x-2y)
14/15xy (x+2y)=14/3xy (x-2y)
(x+2y)/15=(x-2y)/3
x+2y=5 (x-2y)
4x=12y
x=3y
5y/(3y^2)+y/3y^2=14/15
5/(3y)+1/(3y)=14/15
6/(3y)=14/15
3y=90/14
y=30/14
x=90/14