| $$ \begin{aligned}-\sqrt{100}+\sqrt{-150}+\sqrt{1}+\sqrt{-6}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-10+\sqrt{-150}+1+\sqrt{-6} \xlongequal{ } \\[1 em] & \xlongequal{ }-10+\sqrt{-150}+1+\sqrt{6}\cdot i\end{aligned} $$ | |
| ① | $$ - \sqrt{100} = -1 \cdot 10 = -10 $$ |