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