| $$ \begin{aligned}2\sqrt{4}\sqrt{3}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4\sqrt{3}\end{aligned} $$ | |
| ① | $$ 2 \sqrt{12} =
2 \sqrt{ 2 ^2 \cdot 3 } =
2 \sqrt{ 2 ^2 } \, \sqrt{ 3 } =
2 \cdot 2 \sqrt{ 3 } =
4 \sqrt{ 3 } $$ |