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Question
Rationalise the denominators of : `3/sqrt5`
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Solution
`3/sqrt5 xx sqrt5/sqrt5 = (3sqrt5)/5`
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Show that:
`(4 - sqrt5)/(4 + sqrt5) + 2/(5 + sqrt3) + (4 + sqrt5)/(4 - sqrt5) + 2/(5 - sqrt3) = 52/11`
