How to say "we put something under a square root"?

Question

I would like to say that "we put something under a square root" in a math formula. For example my sentence is

The reason for putting the original distances under square root is discussed later.

Here, the original distance was

d_o(x,y) = ...

and my distance is

d_my(x,y) = sqrt( d_o(x,y) )

Maybe the sentence

The reason for square rooting the original distance is discussed later.

would be the right phrasing?

Answer 1

*The reason for putting the original distances under square root is discussed later.

The reason for taking/using the square root of the original distances is discussed later.