Question
Answer
$$\dfrac{4\sqrt{42}}{3\sqrt{14}}=\dfrac{4\sqrt{3}}{3}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{4\sqrt{42}}{3\sqrt{14}}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{4\sqrt{42}}{3\sqrt{14}}\frac{\sqrt{14}}{\sqrt{14}} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}\frac{56\sqrt{3}}{42} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle3}{\textcircled {3}} } }}}\frac{ 56 \sqrt{ 3 } : \color{blue}{ 14 } } { 42 : \color{blue}{ 14 }} \xlongequal{ } \\[1 em] & \xlongequal{ }\frac{4\sqrt{3}}{3}\end{aligned} $$ | |
| ① | Multiply the numerator and denominator by the conjugate of the denominator . $$\color{blue}{ \sqrt{14}} $$. |
| ② | Multiply in a numerator. $$ \color{blue}{ 4 \sqrt{42} } \cdot \sqrt{14} = 56 \sqrt{3} $$ Simplify denominator. $$ \color{blue}{ 3 \sqrt{14} } \cdot \sqrt{14} = 42 $$ |
| ③ | Divide numerator and denominator by $ \color{blue}{ 14 } $. |
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