Question

rationalise the denominator of 1/√7-√2



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Answer 1

Step-by-step explanation:

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

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

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

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