What is algebra?
In GCSE maths, algebra is the area which uses letters and symbols to represent numbers and help us visualise patterns. Algebra can be used in other areas of maths (for example, geometry and trigonometry) to help generalise rules and solve problems.
Topics in algebra include the following:
Algebra is used to write expressions that can represent numbers | 2n+1 represents an odd number when n is an integer | |
Equations | Algebra is used to form equations that can be solved to find unknown values | 2n+1=5 can be solved to give n=2 |
Formulas | Algebra is used to write formulas that show the relationship between different variables | A=πr² is the formula for the area of a circle when the radius is r |
Identities | Algebra can be used to show when two expressions are always true | an✕am=an+m is an identity that shows one of the laws of indices |
Algebra revision resources to ace your exams
You can find out more about algebra, and how it can be used, by reading our revision notes. To test your knowledge, try our exam questions in the algebra section.
For quick-fire GCSE maths revision, use our collection of interactive flashcards for GCSE maths. We also have past papers for your exam practice.
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