Question
Answer
$$r\cdot3+i+r\cdot5-2i=-i+8r$$
Explanation
| $$ \begin{aligned}r\cdot3+i+r\cdot5-2i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-i+8r\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{3r} + \color{red}{i} + \color{blue}{5r} \color{red}{-2i} = \color{red}{-i} + \color{blue}{8r} $$ |
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