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 \(\sqrt 5 = 2.236067977...\) ...

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.

The minimum age of marriage in Scotland could be raised to 18 after the Scottish Government launched a consultation on reforming the law. Scots are being asked whether they think the current minimum ...

In this video I show you everything you need to know about how to Add and Subtract Radical Expressions involving Square Roots. Whether you're in Algebra, Algebra 2, Geometry or Trig, this method WORKS ...