No idea about square rout, but the square roots of 25 are -5 and +5.
20. * * * * * Sort of. ± 20 are the square roots (not rout!) of 400.
Nine :) * * * * * Sort of. ± 9 are the square roots (not rout!) of 400.
3
5.830951894845301
12
4
8.30662386
-8
2.82842712
19
The square root of pi is1.772453850905516027298167483314.