已知x2+y2+1x2+y2+3=8，则x2+y2的值为_刷题宝

题干

已知x2+y2+1x2+y2+3=8，则x2+y2的值为（）

A：－5或1

B：1

C：5

D：5或－1

上一题下一题 0.0难度选择题更新时间:2018-08-20 01:46:22

答案(点此获取答案解析）

B

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