Question

please give me asnwer​

Answer 1

$\green{1.} \frac{ \: \: \: 1}{ \sqrt{7} }$

$= > \frac{ \: \: \: 1}{ \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} }$

$= > \boxed{\frac{ \sqrt{7} }{ \: \: 7} }$

$\blue{2.} \frac{2}{ \sqrt{5} + \sqrt{2} }$

$= > \frac{2}{ \sqrt{5} + \sqrt{2} } \times \frac{ \sqrt{5} - \sqrt{2} }{ \sqrt{5} - \sqrt{2} }$

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

$= > \frac{2( \sqrt{5} - \sqrt{2}) }{5 - 2}$

$= > \boxed{ \frac{2( \sqrt{5} - \sqrt{2} ) }{3} }$

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