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

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

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