Question

rationalise the denominator

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

Answer 1

$\frac{5}{ \sqrt{5} - 2} \\ \\ multiply \: and \: divide \: by \: \sqrt{5} + 2 \\ \frac{5 \sqrt{5 } + 10}{ { \sqrt{5} }^{2} - {2}^{2} } \\ \\ 5 \sqrt{5} + 10$
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