| $$ \begin{aligned}3+2i+5+4i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6i+8\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3} + \color{red}{2i} + \color{blue}{5} + \color{red}{4i} = \color{red}{6i} + \color{blue}{8} $$ |