| $$ \begin{aligned}-i+3-2i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-3i+3\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-i} +3 \color{blue}{-2i} = \color{blue}{-3i} +3 $$ |