Question
Answer
$$3i\cdot6i=-18$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}3i\cdot6i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}18i^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-18\end{aligned} $$ | |
| ① | $$ 3 i \cdot 6 i = 18 i^{1 + 1} = 18 i^2 $$ |
| ② | $$ 18i^2 = 18 \cdot (-1) = -18 $$ |
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