Question
Answer
$$\dfrac{7}{3}\sqrt{3}\sqrt{27}=21$$
Explanation
| $$ \begin{aligned}\frac{7}{3}\sqrt{3}\sqrt{27}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}21\end{aligned} $$ | |
| ① | $$ \frac{ 7 }{ 3 } \sqrt{ 81 } = \frac{ 7 }{ 3 } \cdot 9 = 21 $$ |
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