| $$ \begin{aligned}2\sqrt{3}(\sqrt{2}+\sqrt{3})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2\sqrt{6}+6\end{aligned} $$ | |
| ① | $$ \color{blue}{ 2 \sqrt{3} } \cdot \left( \sqrt{2} + \sqrt{3}\right) = \color{blue}{ 2 \sqrt{3}} \cdot \sqrt{2}+\color{blue}{ 2 \sqrt{3}} \cdot \sqrt{3} = \\ = 2 \sqrt{6} + 6 $$ |