Question

$\frac{5}{2\sqrt{5} }$

Answer 1

$\large\boxed{\begin{array}{l}\rm\dfrac{5}{2\sqrt{5}}\cdot\dfrac{\sqrt{5}}{\sqrt{5}}=\dfrac{5\sqrt{5}}{2\cdot\sqrt{5^2}}\\\\\rm\dfrac{5}{2\sqrt{5}}=\dfrac{\backslash\!\!\!5\sqrt{5}}{2\cdot\backslash\!\!\!5}=\dfrac{\sqrt{5}}{2}\end{array}}$