$$ \begin{aligned}-\sqrt{192}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-8\sqrt{3}\end{aligned} $$ | |
① | $$ - \sqrt{192} =
- \sqrt{ 8 ^2 \cdot 3 } =
- \sqrt{ 8 ^2 } \, \sqrt{ 3 } =
- 8 \sqrt{ 3 }$$ |