but you would need to simplify your answer at the end. Rationalising the denominator when the denominator has a rational term and a surd If the denominator of a fraction includes a rational number ...

Watch this video to learn about the rules of surds. For example, \(\sqrt 4 = 2\) is not a surd. However \(\sqrt 5\) is a surd. If you use a calculator, you will see that \(\sqrt 5 = 2.236067977..