$$ \begin{aligned}(\sqrt{2}\cdot\sqrt{31}\sqrt{53})^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3286\sqrt{3286}\end{aligned} $$ | |
① | $$ (\sqrt{2}\cdot\sqrt{31}\sqrt{53})^3 =
\sqrt{3286} ^2 \cdot \sqrt{3286} =
\lvert 3286 \rvert \cdot \sqrt{3286} =
3286\sqrt{3286} $$ |