Rationalising an expression means getting rid of any surds from the bottom (denominator) of fractions. Usually when you are asked to simplify an expression it means you should also rationalise it.

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Adding the indices gives \(5\frac{1}{2}\) which is \(\frac{11}{2}\). \(= {y^{\frac{{11}}{2}}}\) Now try the examples questions below.

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