Simplify 3√8+2√186√2

For $3\sqrt{8}$:
$\sqrt{8} = \sqrt{4 \times 2} = \sqrt{4} \times \sqrt{2} = 2\sqrt{2}$
So, $3\sqrt{8} = 3 \times 2\sqrt{2} = 6\sqrt{2}$

For $2\sqrt{18}$:
$\sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2}$
So, $2\sqrt{18} = 2 \times 3\sqrt{2} = 6\sqrt{2}$

The expression becomes:

The final answer is $6\sqrt{2}$.