Question
Answer
$$14i\cdot3i=-42$$
Explanation
| $$ \begin{aligned}14i\cdot3i& \xlongequal{ }42i^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-42\end{aligned} $$ | |
| ① | $$ 42i^2 = 42 \cdot (-1) = -42 $$ |
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