In the first column, i need to find the square roots. in the second column, i need to find the principal square root.
the number already written, is the exponential expression.

Sqrt(25): and :
Sqrt(25): 5 and -5: 5
Explanation:
5•5=25
and
-5•-5=25
The principle square root is the positive square root so choose 5 for the last column

Sqrt(100): and:
Sqrt(100): 10 and -10: 10
10•10=100
and
-10•-10=100
The principle square root is the positive square root so choose 10 for the last column

BEST OF LUCK! :)