Question
Answer
$$\dfrac{9\sqrt{12}}{2\sqrt{18}}=\dfrac{3\sqrt{6}}{2}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{9\sqrt{12}}{2\sqrt{18}}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{9\sqrt{12}}{2\sqrt{18}}\frac{\sqrt{18}}{\sqrt{18}} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}\frac{54\sqrt{6}}{36} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}\frac{ 54 \sqrt{ 6 } : \color{blue}{ 18 } } { 36 : \color{blue}{ 18 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{3\sqrt{6}}{2}\end{aligned} $$ | |
| ① | Multiply the numerator and denominator by the conjugate of the denominator . $$\color{blue}{ \sqrt{18}} $$. |
| ② | Multiply in a numerator. $$ \color{blue}{ 9 \sqrt{12} } \cdot \sqrt{18} = 54 \sqrt{6} $$ Simplify denominator. $$ \color{blue}{ 2 \sqrt{18} } \cdot \sqrt{18} = 36 $$ |
| ③ | Divide numerator and denominator by $ \color{blue}{ 18 } $. |
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