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2√2是多少
更新时间： 2020-10-28 00:00:00  

2√2约等于2.828。因为√2约等于1.414，另外2√2，表示2和根号2的乘积。因此2√2约等于2.828。√在数学上称作“根号”，表示求一个数的算术平方根。数a的算术平方根记作√a，其中a≥0。例如，因为2²=4，所以√4=2。0的算术平方根是0，而负数没有算术平方根。

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