An expression is a set of terms combined using the operations +, , x or ÷, for example 4 x 3 or 5 x 2 3 x y + 17. An equation states that two expressions are equal in value, for example 4 b 2 = 6.

Learn about and revise how to simplify algebra using skills of expanding brackets and factorising expressions with GCSE Bitesize AQA Maths.