Question

Rationalise denominator of 1/√5-2​

Answer 1

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

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

$\frac{ \sqrt{5} + 2 }{ { (\sqrt{5}) }^{2} - {2}^{2} }$

$\frac{ \sqrt{5} + 2}{5 - 4}$

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

$= \sqrt{5} + 2$

Answer 2

Answer:

Refer to above attachment..