Mathematics A-Level
Substitution
What Substitution means in Mathematics A-Level, as defined for AQA.
Definition of Substitution
Check what you remember
Read the wording for your board, then hide it and explain Substitution in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Rearranging one equation to make a variable the subject and putting that expression into the other equation.
Topics that use Substitution
- B: Algebra and functions (AQA A-Level)
Related terms
- Asymptote
- Asymptotes
- Completing the square
- Composite function
- Conjugate
- critical values
- direct proportion
- Discriminant
Using Substitution in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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