Answer
$$7-3i+4+2i=-i+11$$
Explanation
| $$ \begin{aligned}7-3i+4+2i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-i+11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7} \color{red}{-3i} + \color{blue}{4} + \color{red}{2i} = \color{red}{-i} + \color{blue}{11} $$ |
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