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Question
Rationalise the denominator of `4/sqrt(2)`.
Sum
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Solution
To rationalise the denominator of `4/sqrt(2)`
Multiply numerator and denominator by `sqrt(2)`:
`4/sqrt(2) xx sqrt(2)/sqrt(2) = (4sqrt(2))/2`
Now simplify:
`(4sqrt(2))/2 = 2sqrt(2)`
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Chapter 1: Rational and Irrational Numbers - EXERCISE 1C [Page 15]
