Question

Rationalise the denominator: 3/√2-√5​

Answer 1

$\frac{3( \sqrt{2} + \sqrt{5}) }{ (\sqrt{2} - \sqrt{5})( \sqrt{2} + \sqrt{5}) } \\ = \frac{3 \sqrt{2} + 3 \sqrt{5} }{ - 3} \\ = - 1( \sqrt{2 } + \sqrt{5} )$

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