| $$ \begin{aligned}17+3i-11i+15& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-8i+32\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{17} + \color{red}{3i} \color{red}{-11i} + \color{blue}{15} = \color{red}{-8i} + \color{blue}{32} $$ |