Question

Rationalise the denominator of 1/4√5.

Answer 1

Answer:

$\frac{1}{4 - \sqrt{5} } \\ \\ = \frac{1}{4 - \sqrt{5} } \times \frac{4 + \sqrt{5} }{4 + \sqrt{5} } \\ \\ = \frac{4 + \sqrt{5} }{16 - 5} \\ \\ = \frac{4 + \sqrt{5} }{11}$

The.answer is 4 + root 5 over 11.