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