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