已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1

来源：学生作业帮助网编辑：六六作业网时间：2024/05/10 11:45:03

已知xy满足等式2x+x²+x²y²+2=-2xy,x+y值为A.-1B.0C.2D.1已知xy满足等式2x+x²+x²y²+2=-2xy,

已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1

已知x y满足等式2x+x²+x²y²+2=-2xy,x+y值为 A.-1 B.0 C.2 D.1
2x+x²+x²y²+2=-2xy
2x+x²+x²y²+2+2xy=0
（x+1)^2 +(xy+1)^2 =0
x=-1,xy=-1,y=1
x+y=0
B