问题:
实数x,y满足(x 2+y 2) 2+(x 2+y 2)-2=0,则x 2+y 2的值为
[ ]
A.1
B.-2
C.2或-1
D.
实数x,y满足(x 2+y 2) 2+(x 2+y 2)-2=0,则x 2+y 2的值为
B.-2
C.2或-1
D.
[ ]
A.1B.-2
C.2或-1
D.
参考答案: