iv.
\(3\sqrt{6}\)
\(-4\sqrt{2}\)
\(5\sqrt{3}\)
\(2\)
\(=\)
\((3\sqrt{6} \times 2) - (5\sqrt{3} \times -4\sqrt{2})\)
\(=\)
\(6\sqrt{6} + 20\sqrt{6}\)
\(=\)
\(26\sqrt{6}\)