In square root of numbers, the numbers are multiplied with the same number to get a resultant number. The square root ‘n' of a number ‘x' is that number which when multiplied by itself gives the given number ‘x' as the product. i.e $\sqrt{x}$ times $\sqrt{x}$

(i) We use the sign v to indicate the square root of a number.
i.e., $\sqrt{81}$ = 9, $\sqrt{225}$ = 15,etc.
(ii) We can calculate the square root of positive numbers only. However, the square root of a positive number may be a positive integer, e.g., $\sqrt{25}$ = + 5
The square of 2 is 4, then we can also say that the square root of 4 is 2
If, 6 × 6 = 36 = 62, then square root of 36 is 6
And 8 × 8 = 64= 82, then square root of 64 is 8
Thus, n is the square root of a number x, if x = n × n= n2

The square root of a number is that number which when multiplied by itself gives the given number as the product.

We denote the square root of a number by $\sqrt{}$

Example $\sqrt{x}$ , $\sqrt{2}$ , $\sqrt{9}$