若(m²+n²)²-2(m²+n²)-3=0,那么m²+n&
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若(m²+n²)²-2(m²+n²)-3=0,那么m²+n²等于_____
![若(m²+n²)²-2(m²+n²)-3=0,那么m²+n&](/uploads/image/z/8950112-8-2.jpg?t=%E8%8B%A5%28m%26%23178%3B%2Bn%26%23178%3B%29%26%23178%3B-2%28m%26%23178%3B%2Bn%26%23178%3B%29-3%3D0%2C%E9%82%A3%E4%B9%88m%26%23178%3B%2Bn%26)
(m²+n²)²-2(m²+n²)-3=0
把m²+n²看作一个数,因式分解得:
(m²+n²-3)(m²+n²+1)=0
m²+n²=3;
把m²+n²看作一个数,因式分解得:
(m²+n²-3)(m²+n²+1)=0
m²+n²=3;
若(m²+n²)²-2(m²+n²)-3=0,那么m²+n&
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