Question
Answer
$$2i\cdot6i^2=-12i$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}2i\cdot6i^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2i\cdot(-6) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-12i\end{aligned} $$ | |
| ① | $$ 6i^2 = 6 \cdot (-1) = -6 $$ |
| ② | $$ 2 i \cdot -6 = -12 i $$ |
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