Question
Answer
$$\dfrac{\sqrt{900}}{\sqrt{20}}=3\sqrt{5}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{\sqrt{900}}{\sqrt{20}}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{\sqrt{900}}{\sqrt{20}}\frac{\sqrt{20}}{\sqrt{20}} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}\frac{60\sqrt{5}}{20} \xlongequal{ } \\[1 em] & \xlongequal{ }3\sqrt{5}\end{aligned} $$ | |
| ① | Multiply the numerator and denominator by the conjugate of the denominator . $$\color{blue}{ \sqrt{20}} $$. |
| ② | Multiply in a numerator. $$ \color{blue}{ \sqrt{900} } \cdot \sqrt{20} = 60 \sqrt{5} $$ Simplify denominator. $$ \color{blue}{ \sqrt{20} } \cdot \sqrt{20} = 20 $$ |
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