\[4\sqrt{3}\ и\ \ 3\sqrt{8}\]
\[4\sqrt{3} = \sqrt{16 \cdot 3} = \sqrt{48};\ \ \ \]
\[3\sqrt{8} = \sqrt{9 \cdot 8} = \sqrt{72};\]
\[\sqrt{48} < \sqrt{72}\]
\[4\sqrt{3} < 3\sqrt{8}.\]