| $$ \begin{aligned}3\sqrt{2}^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3\cdot2\sqrt{2} \xlongequal{ } \\[1 em] & \xlongequal{ }6\sqrt{2}\end{aligned} $$ | |
| ① | $$ \sqrt{2}^3 =
\sqrt{2} ^2 \cdot \sqrt{2} =
\lvert 2 \rvert \cdot \sqrt{2} =
2\sqrt{2} $$ |