Question

√(-2)²

Answer 1

本题的解题过程有两种写法：
一、√(-2)²=√4=2，
二、√(-2)²=I-2I=2。

Answer 2

根式计算
√（-2）²＝|-2|＝2

Answer 3

Answer 4

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Answer 5

根式计算
√(-2)²=√2² =2