Find the square root of 81

To find the square root of 81 we will factorise it first

Prime factorizing the number 81 we can divide the entire number by 3 such as

By prime factorisation, we know:

81 = 3 x 3 x 3 x 3

Factorization of 81

So prime factorization of 81 is 3 x 3 x 3 x 3 which can be written as (3 x 3 ) X ( 3 x 3)

Pairing the numbers to get the perfect squares we get;

81 = 9 x 9 = 92

Answer

Hence The square root of 81 is 9

Hence, √81 = 9

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