$$ \begin{aligned}-\sqrt{150}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-5\sqrt{6}\end{aligned} $$ | |
① | $$ - \sqrt{150} =
- \sqrt{ 5 ^2 \cdot 6 } =
- \sqrt{ 5 ^2 } \, \sqrt{ 6 } =
- 5 \sqrt{ 6 }$$ |