# How do you add radicals sqrt10 + sqrt10?

You can simply combine like terms and call it $2 \sqrt{10}$.
Say I had $x + x$. There are two $x$ terms, so we call it $2 x$, or two times $x$. Say we let $x = \sqrt{10}$ and had$\sqrt{10} + \sqrt{10}$. We would simply call it $2 \sqrt{10}$.