15问答网 > 若(x^2+y^2-1)^2=4,则x^2+y^2=

若(x^2+y^2-1)^2=4,则x^2+y^2=

2024-12-02 15:12:57
推荐回答（1个）
回答1：

(x^2+y^2-1)^2=4
所以x^2+y^2-1=2或者x^2+y^2-1=-2
所以x^2+y^2=3或者x^2+y^2=-1
因为x^2+y^2>0
所以x^2+y^2=3

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