Question

How do you find a sum of a square root?

Answer 1

You can add two square roots of the numbers if the numbers are the same:

$\sqrt{a}+\sqrt{a}=2\sqrt{a}\\\\n\sqrt{a}+m\sqrt{a}=(n+m)\sqrt{a}\\\\\sqrt{a}+\sqrt{b}=\sqrt{a}+\sqrt{b}$