Question
Answer
$$2-3i+9+21i=18i+11$$
Explanation
| $$ \begin{aligned}2-3i+9+21i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}18i+11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2} \color{red}{-3i} + \color{blue}{9} + \color{red}{21i} = \color{red}{18i} + \color{blue}{11} $$ |
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