(x+2)(y-1)=0
x²-xy-12=0
xy-x+2y-2=0
x²-xy=12
xy-x+2y=2
x(x-y)=12
(x+2)(y-1)=0
y=x-12/x
(x+2)(x-12/x-1)=0
(x+2)((x²-12-x)/x)=0
(x²-12-x)/x=0
(x²-x-12)/x=0
D=1+48=49
x1=-3
x2=4
((x+2)*(x+3)*(x-4))/x=0 при х≠0
(x+2)*(x+3)*(x-4)=0
x+2=0 x=-2, y=4
x+3=0 x=-3, y=1
x-4=0 x=4, y=1
=)...€∫∫