Question
Answer
$$\dfrac{18}{9}i=2i$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{18}{9}i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{ 18 : \color{orangered}{ 9 } }{ 9 : \color{orangered}{ 9 }} \cdot i \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{2}{1}i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}2i\end{aligned} $$ | |
| ① | Divide both the top and bottom numbers by $ \color{orangered}{ 9 } $. |
| ② | Remove 1 from denominator. |
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