(x²+y²)²—3(x²+y²)—4=0 求x²+y²=_______

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(x²+y²)²—3(x²+y²)—4=0 求x²+y²=_______
(x²+y²)²—3(x²+y²)—4=0 求x²+y²=_______

(x²+y²)²—3(x²+y²)—4=0 求x²+y²=_______
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