Question
Answer
$$10-4i+11-20i+7+16i=-8i+28$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}10-4i+11-20i+7+16i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-24i+21+7+16i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-8i+28\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{10} \color{red}{-4i} + \color{blue}{11} \color{red}{-20i} = \color{red}{-24i} + \color{blue}{21} $$ |
| ② | Combine like terms: $$ \color{blue}{-24i} + \color{red}{21} + \color{red}{7} + \color{blue}{16i} = \color{blue}{-8i} + \color{red}{28} $$ |
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