Answer
$$3-12i+5-3i=-15i+8$$
Explanation
| $$ \begin{aligned}3-12i+5-3i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-15i+8\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3} \color{red}{-12i} + \color{blue}{5} \color{red}{-3i} = \color{red}{-15i} + \color{blue}{8} $$ |
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