Answer
$$3+root\cdot3i=3io^2rt+3$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}3+root\cdot3i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3+3io^2rt \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}3io^2rt+3\end{aligned} $$ | |
| ① | $$ r o o t \cdot 3 i = 3 i o^{1 + 1} r t = 3 i o^2 r t $$ |
| ② | Combine like terms: $$ 3io^2rt+3 = 3io^2rt+3 $$ |
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