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Rationalise the denominator

Interactive practice questions

Fill in the blanks to complete the question below.

The number $\sqrt{\frac{2}{7}}$27 can be rewritten without a radical in the denominator by multiplying both the numerator and denominator by $\sqrt{\editable{}}$.

Less than a minute

Fill in the blanks to complete the statement below.

Rationalise the denominator for the given expression:


Rationalise the denominator and give your answer in the simplest form: $\frac{7}{\sqrt{21}}$721

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