Question

rationalise the denominator 1/ 8 + 3 root 5​

Answer 1

$\frac{1}{8 + 3 \sqrt{5} } \\ \\ = \frac{1}{8 + 3 \sqrt{5} } \times \frac{8 - 3 \sqrt{5} }{8 - 3 \sqrt{5} } \\ \\ = \frac{8 - 3 \sqrt{5} }{ {8}^{2} - ( {3 \sqrt{5} )}^{2} } \\ \\ = \frac{8 - 3 \sqrt{5} }{64 - 45} \\ \\ = \frac{8 - 3 \sqrt{5} }{19}$

Answer 2

please mark as brainliest