\(3 \sqrt{-8} + 4 \sqrt{-50}\)
\(= 3i \sqrt{8} + 4i \sqrt{50}\)
\(= 3i \sqrt{4 \times 2} + 4i \sqrt{25 \times 2}\)
\(= 6i \sqrt{2} + 20i \sqrt{2}\)
\(= 26i \sqrt{2}\)
I think part of the second question is cut off so I can't help but I hope I have helped with the first one.
