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题目简介
化简▲.的平方根为▲-九年级数学
题目详情
答案
解:∵
∴
∵
∴
故答案为:4;±2.
本题考查的是算术平方根及平方根的概念,解答此题的关键是熟知一个数的平方根有两个,这两个数互为相反数.