The square root of a given number is such a number. Which by multiply by itself is the given number.

Let's denote the square root with "√".

## How to Calculate Square Root?

**Let us understand by example -**

The square root of a given number "a" -:

The square root b of the given number a is such a number, that multiplying itself (i.e. b × b) gives the result (b × b = a) a.

And denote it with √a = ± b.

Here sign ± means that the square root of a given number can be both negative and positive number. Like the square root of x in the above example =a = - can be both b and + b, because (-b) × (-b) = a

b × b = a Can be both.

**square root of 4**

We know that,

2 × 2 = (-2) × (-2) = 4

Therefore √4 = ± 2

**square root of 9**

3 × 3 = (-3) × (-3) = 9

√9 = ± 3