已知m²+mn+2n²=11,mn+n²=6,则m²+n²的值为______
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![已知m²+mn+2n²=11,mn+n²=6,则m²+n²的值为______](/uploads/image/z/3802258-10-8.jpg?t=%E5%B7%B2%E7%9F%A5m%26%23178%3B%2Bmn%2B2n%26%23178%3B%3D11%2Cmn%2Bn%26%23178%3B%3D6%2C%E5%88%99m%26%23178%3B%2Bn%26%23178%3B%E7%9A%84%E5%80%BC%E4%B8%BA______)
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已知m²+mn+2n²=11,mn+n²=6,则m²+n²的值为______
已知m²+mn+2n²=11,mn+n²=6,则m²+n²的值为______
已知m²+mn+2n²=11,mn+n²=6,则m²+n²的值为______
m²+mn+2n²=11 (1)
mn+n²=6 (2)
(1)-(2)
m²+n²=5
(m²+mn+2n²)-(mn+n²)=11-6=5
m²+mn+2n²=11 (1) mn+n²=6 (2)
(1)-(2)
可以得到:m²+n²=5