Question

what is "the square root of a number "

Answer 1

something times itself equals the square root
ex. 3x3=9 9x9=81

Answer 2

The square root of a number is the reversing of a squared number.
For example, 4 x 4 (or 4 squared) = 16.
The square root of 16 is 4.
I  hope this helps!