Answer:

Explanation:
Mumble. The square root is something called "monotonic", which means that

A neat trick to solve this will be: go back from 17 till you find a perfect square, then add 1 to it:
In our case it's easy to do it, since the number before 17 is a perfect square already (
), so we can pick it as the lower bound, and then add 1 to the base to find the next one (
