Question
Answer
$$-21+65i-30+12i=77i-51$$
Explanation
| $$ \begin{aligned}-21+65i-30+12i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}77i-51\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-21} + \color{red}{65i} \color{blue}{-30} + \color{red}{12i} = \color{red}{77i} \color{blue}{-51} $$ |
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