Question

square root of 81 is​

Answer 1

$\sqrt{81 } \\ \\ = \sqrt{9 \times 9} \\ \\ = 9$

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Answer 2

Heya mate,

Square root of 81 is 9

U can find it with an easy method.

Here it is:

let root =x^2

then

root 81 = x^2

(root is lhs will covert Into square on rhs)

so,

x=9

Hope it may help u..