Question

please help me U was lost ​

Answer 1

$\frac{1}{7 + \sqrt{5} } \times \frac{7 - \sqrt{5} }{ 7 - \sqrt{5} }$

$\frac{7 - \sqrt{5} }{ {(7)}^{2} - { (\sqrt{5}) }^{2} }$

$\frac{7 - \sqrt{5} }{49 - 5}$

$\frac{7 - \sqrt{5} }{44}$