Verified answer

(√(11+2))(√(11-2))

Look at the 2nd part.

(√(11-2)) is saying √9 = 3.

3√(11+2)

Final answer is simply...

3√13

You didn't happen to mean (√(11)+2)(√(11)-2), did you? If so,

(√(11)+2)(√(11)-2) = 11 - 4 = 7

Otherwise, (√(11+2))(√(11-2)) = (√(13))(√(9)) = 3√13

that would be root 13 times root 9, or root 13 times 3, so the answer would be 3 root (symbol) 13.