How to use underbrace in the following?

Question

I was writing my project.

First notice the following:

When I use the \underbraceit becomes like...

Actually, I want the root sign like the above while using \underbrace

My code:

$\sqrt{(x-x^\prime)^2 + \underbrace{{(y-y^\prime)^2}}_{\geq 0} }\geq x$

Please help me.

Answer 1

You can load the yhmath package and use this code!

$\sqrt{(x-x')^2+ \smash[b]{\underbrace{(y-y')^2}_{\geq 0} }}\geq x$