Answer
$$-2+4i+3-9i=-5i+1$$
Explanation
| $$ \begin{aligned}-2+4i+3-9i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-5i+1\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-2} + \color{red}{4i} + \color{blue}{3} \color{red}{-9i} = \color{red}{-5i} + \color{blue}{1} $$ |
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