Question

Rationalise the demanitator 5/√7 -√5​

Answer 1

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

$= \frac{5( \sqrt{7} + \sqrt{5} )}{( \sqrt{7} - \sqrt{5} )( \sqrt{7} + \sqrt{5} )}$

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

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

Answered by *BIG BRAIN*