如果(x²+y²)(x²+y²-10)+25=0,求x²+y²的值
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如果(x²+y²)(x²+y²-10)+25=0,求x²+y²的值
如果(x²+y²)(x²+y²-10)+25=0,求x²+y²的值
如果(x²+y²)(x²+y²-10)+25=0,求x²+y²的值
(x²+y²)(x²+y²-10)+25=0
(x²+y²)²-10(x²+y²)+25=0
(x²+y²-5)²=0
所以x²+y²-5=0
x²+y²=5