Question

1/(√7+√2)


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Answer 1

Answer:

$\frac{1}{ \sqrt{7 + \sqrt{2} } }$

$= \frac{1}{ \sqrt{7} + \sqrt{2} } \times \frac{ \sqrt{7} - \sqrt{2} }{ \sqrt{7} - \sqrt{2} }$

$\frac{ \sqrt{7} - \sqrt{2} }{7 - 2} = \frac{ \sqrt{7} - \sqrt{2} }{ 5}$

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