Question

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

Answer 1

$\frac{1}{2 \sqrt{5 - 2} } - \frac{1}{2 \sqrt{5 + 2} } = \frac{1}{2 \sqrt{3} } - \frac{1}{2 \sqrt{6} } = \frac{ \sqrt{3} }{6} - \frac{ \sqrt{6} }{12}$