Question
Answer
$$-4i^3-2x=4i-2x$$
Explanation
| $$ \begin{aligned}-4i^3-2x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4i-2x\end{aligned} $$ | |
| ① | $$ -4i^3 = -4 \cdot \color{blue}{i^2} \cdot i =
-4 \cdot ( \color{blue}{-1}) \cdot i =
4 \cdot \, i $$ |
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