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Question
Rationalise the denominator of `10/sqrt(5)`.
Sum
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Solution
To rationalise the denominator of `10/sqrt(5)`
Multiply numerator and denominator by `sqrt(5)`:
`10/sqrt(5) xx sqrt(5)/sqrt(5) = (10sqrt(5))/5`
Now simplify:
`(10sqrt(5))/5 = 2sqrt(5)`
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Chapter 1: Rational and Irrational Numbers - EXERCISE 1C [Page 15]
