You must think your way through them.

Points on look like this:

Knowing that, such points are what distance from (3,0)? Perhaps

The real art of this problem is realizing that it does not qute matter that you actually minimize the distance directly. Since the square root is so well-behaved, you can just as effectively minimize the square of the distance. It is the beauty of a unique answer. It doesn't care how you find it.