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kuing 发表于 2023-1-16 15:44 当 `a` 不是最小的时候似乎也能化简,结果有所不同,是 \[\sqrt{-2a^2-5b^2-5c^2+5a(b+c)+2bc+(4b+4c-2a)\s ...
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2025-7-15 14:01 GMT+8
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