Thank you for the opportunity to help you with your question!

The square root of 46 is not a whole number as can be checked easily by squaring 2, 4, 5, 6 and 7 (there is no need to go beyond 7 whose square is 49, already greater than 46.

We can compute it with a calculator (on a smartphone) or in Excel. In Excel, by entering the line = sqrt(46) gives the answer 6.78233 (also the negative of this number is a solution if desired).

Please let me know if you need any clarification. I'm always happy to answer your questions.