How do you add 2 square roots together?

Answer 1

It depends on which square roots. I think some examples will help. I will write S(2) to mean the square root of 2 for this answer. So S(2)+S(2)=2S(2). There is no other way to combine them. However, S(8)+S(2)=S(4x2)+S(2)=2S(2)+S(2)=3S(2) So you can combine. Basically, you combine like terms and whenever possible try to create like terms. If you had S(21)+S(19), they are NOT like terms and there is nothing more you can combine. You are done.