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National 5 Simplifying expressions using the laws of indices Test questions Indices show where a number has been multiplied by itself, eg squared or cubed, or to show roots of numbers, eg square root.

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