Question

rationalise the denominator​

Answer 1

Answer:

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Answer 2

Answer:

$\frac{5}{ \sqrt{7} } = \frac{5}{ \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} } = \frac{5 \times \sqrt{7} }{ \sqrt{7} \times \sqrt{7} } = \frac{5 \sqrt{7} }{7}$