Noting that is a good thing !
However, and pardon me for that, but I don't know how I got to the answer... It was quite automatic
(it equals 2)
Actually, I think that at first I was telling myself that the RHS needed parentheses. Making parentheses over the last 2 sqrt(2) wouldn't have made the problem easier. So if there were, it should have been over the first two sqrt(2)