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负根号9等于多少急说明理由
更新时间: 2020-07-15 00:00:00  

负根号九等于正负三。

因为九是自然数,所以九开根号有正负两种情况。所以说负根号九等于正负三。

关键词: 根号 等于 多少 说明 理由

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