Система
x^2+y^2=10
x-y=4
x=4+y
(4+y)^2+y^2=10
16+8y+y^2+y^2=10
2y^2+8y+6=0
D=16-12=4
y1=-4+2/2=-1
y2=-4-2/2=-3
x1=4+(-1)=3
x2=4+(-3)=1
ответ:(3;-1);(1;-3)
Система
x^2+y^2=10
x-y=4
x^2+y^2=10
x=4+y
(4+y)^2+y^2=10
x=4+y
16+8y+y^2+y^2=10
x=4+y
2y^2+8y+6=0
x=4+y
2y^2+8y+6=0
D=16-12=4
y1=-4+2/2=-1
y2=-4-2/2=-3
x1=4+(-1)=3
x2=4+(-3)=1
ответ:(3;-1);(1;-3)