## How do you write the square root of a number?

A square root is written with a radical symbol √ and the number or expression inside the radical symbol, below denoted a, is called the radicand. To indicate that we want both the positive and the negative square root of a radicand we put the symbol ± (read as plus minus) in front of the root.

## What is a square root of 21?

List of Perfect Squares

NUMBER SQUARE SQUARE ROOT
18 324 4.243
19 361 4.359
20 400 4.472
21 441 4.583

## How do you type 2 squared?

Inserting the squared symbol on your Android smartphone is relatively easy and straightforward. To insert the squared sign, just long-press the number 2 and it will insert the superscript ².

## How do you insert a square in Google forms?

To insert a square root, just type sqrt and then the Enter or Tab key to insert the square root symbol. Then just type the number or expression you want to include under the square root. Use the Enter key when finished to continue typing the rest of your equation.

## How do you find square root without a calculator?

Finding square roots of of numbers that aren’t perfect squares without a calculator

1. Estimate – first, get as close as you can by finding two perfect square roots your number is between.
2. Divide – divide your number by one of those square roots.
3. Average – take the average of the result of step 2 and the root.
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## How do you find the root of 21?

How to Find the Square Root of 21?

1. Step 1: Write 21 as 21.000000.
2. Step 2: 4 × 4 = 16.
3. Step 3: Multiply the quotient 4 by 2.
4. Step 4: We find 5 added to 80 is 85 and 85 × 5 = 425.
5. Step 5: Multiply the quotient 45 by 2.
6. Step 6: We find 8 + 900 is 908 and 908 × 8 = 7264.
7. Repeat the division process till we get the remainder.

## Is the square root of 21 a whole number?

As we have calculated further down on this page, the square root of 21 is not a whole number. 21 is not a perfect square.

## Is 21 a perfect square?

In mathematics, a square is a product of a whole number with itself. For instance, the product of a number 2 by itself is 4. In this case, 4 is termed as a perfect square. A square of a number is denoted as n × n. Example 1.

Integer Perfect square
20 x 20 400
21 x 21 441
22 x 22 484
23 x 23 529 