Simplify Square Root of 21

Here we will show you step-by-step how to simplify the square root of 21. The square root of 21 can be written as follows:


	√	21

The √ symbol is called the radical sign. To simplify the square root of 21 means to get simplest radical form of √21.

Step 1: List Factors
List the factors of 21 like so:

1, 3, 7, 21

Step 2: Find Perfect Squares
Identify the perfect squares* from the list of factors above:

1

Since 1 is the only perfect square above, the square root of 21 cannot be simplified.

However, you may be interested in the decimal and exponent form instead.

Square root of 21 in Decimal form rounded to nearest 5 decimals:

4.58258

Square root of 21 written with Exponent instead of Radical:

21^½

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Simplify Square Root of 22
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* List of Perfect Squares