Square root of a number is the value that returns the original number on multiplied by itself. Finding square root by prime factorisation is an easy method. We need to factories the number under the root and pair them in two.
To find the square root of 49 we will factorise it first
Prime factorizing the number 49
49= 7 X 7
Factorization of 49
So prime factorization of 49 is 7 X 7
The square root of 49 which is 7 or √49=7
Hence The square root of 49 is 7