Question

http://prntscr.com/52j3kn

Answer 1

\[\sqrt{2} (5 + \sqrt{8})\]
distribute sqrt2 to the quantity
\[ \sqrt{2}(5) + \sqrt{2}(\sqrt{8})\]
\[5 \sqrt{2} + \sqrt{16}\]
\[5 \sqrt{2} + 4\]