2. B)
¯x^2+2x+1=x^2−x−6+y
x^2+2x−x^2+x−y=−7
3x−y=−7
-y=-7-3x
¯xy+2x-2y-4=xy-10
xy+2x-2y-xy=-6
2x-2y=-6
2x+2(-7-3x)=-6
2x-14-6x=-6
-4x=8
x=-2
y=7+3x
y=7+3(-2)
y=7-6
y=1
