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.

Simplifying expressions using the laws of indices Fractions as indices - Rule 2 Indices show where a number has been multiplied by itself, eg squared or cubed, or to show roots of numbers, eg square ...

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 ...

Enterprise Spotlight: Setting the 2026 IT agenda Download the January 2026 issue of the Enterprise Spotlight from the editors of CIO, Computerworld, CSO, InfoWorld, and Network World and learn about ...

Customer stories Events & webinars Ebooks & reports Business insights GitHub Skills ...