{x=1-2y ; {(1-2у)^2-y(1-2y)-2y^2=1
1-4y+4y^2-y+2y^2-2y^2=1
4y^2-5y=0
y(4y-5)=0
y=5/4
x=1-2*5/4
x=-3/2 ответ (-3/2; 5/4)
{x=1-2y ; {(1-2у)^2-y(1-2y)-2y^2=1
1-4y+4y^2-y+2y^2-2y^2=1
4y^2-5y=0
y(4y-5)=0
y=5/4
x=1-2*5/4
x=-3/2 ответ (-3/2; 5/4)