Question
Answer
$$4+7i-5-9i=-2i-1$$
Explanation
| $$ \begin{aligned}4+7i-5-9i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-2i-1\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{4} + \color{red}{7i} \color{blue}{-5} \color{red}{-9i} = \color{red}{-2i} \color{blue}{-1} $$ |
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