Question
Answer
$$2i(-3i)(\dfrac{6}{7}i)^3=6(\dfrac{6}{7}i)^3$$
Explanation
| $$ \begin{aligned}2i(-3i)(\frac{6}{7}i)^3& \xlongequal{ }-6i^2(\frac{6}{7}i)^3 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6(\frac{6}{7}i)^3\end{aligned} $$ | |
| ① | $$ -6i^2 = -6 \cdot (-1) = 6 $$ |
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