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.

Abstract: This paper describes a capacitive-gain amplifier (CGA) with common-mode (CM) sampling (CMS) and switched-capacitor driving capability. The CMS CGA defines the amplifier CM voltage in a ...

Abstract: People with intellectual, language and learning disabilities face accessibility barriers when reading texts with complex words. Following accessibility guidelines, complex words can be ...