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