| $$ \begin{aligned}5+6i+4-8i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-2i+9\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{5} + \color{red}{6i} + \color{blue}{4} \color{red}{-8i} = \color{red}{-2i} + \color{blue}{9} $$ |