Question
Answer
$$\dfrac{18+4\sqrt{5}}{2}=9+2\sqrt{5}$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{18+4\sqrt{5}}{2}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{9+2\sqrt{5}}{1} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}9+2\sqrt{5}\end{aligned} $$ | |
| ① | Divide both numerator and denominator by 2. |
| ② | Remove 1 from denominator. |
This page was created using
Rationalize Denominator Calculator