| $$ \begin{aligned}-3+71i+9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}71i+6\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-3} +71i+ \color{blue}{9} = 71i+ \color{blue}{6} $$ |