如何计算Square Root

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The square root of a number x is a value r such that r² = x. Every positive number has two square roots: a positive (principal) root and a negative root. Only zero has a single square root: zero itself.

分步指南

1. 1Factor the number into prime factors
2. 2Pair up identical prime factors
3. 3Take one factor from each pair and multiply them
4. 4Any unpaired factors stay inside the radical symbol

例题解析