Question

$$\sqrt{ 5 } +2+ \frac{ 1 }{ \sqrt{ 5+ } 2 }$$

Answer

sqrt(5)+2+sqrt(5+)/10

Solution


Regroup terms.
\[\sqrt{5}+2+\frac{1}{2\sqrt{5+}}\]
Rationalize the denominator: \(\frac{1}{2\sqrt{5+}} \cdot \frac{\sqrt{5+}}{\sqrt{5+}}=\frac{\sqrt{5+}}{2\times 5+}\).
\[\sqrt{5}+2+\frac{\sqrt{5+}}{2\times 5+}\]
Simplify  \(2\times 5\)  to  \(10\).
\[\sqrt{5}+2+\frac{\sqrt{5+}}{10+}\]
Simplify  \(10+\)  to  \(10\).
\[\sqrt{5}+2+\frac{\sqrt{5+}}{10}\]