Checking solutions by substitution
What Checking solutions by substitution means in Mathematics GCSE, as defined for AQA.
Definitions of Checking solutions by substitution
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Reference: AQA
Substitute a test value from your solution set back into the original inequality to confirm the direction is correct.
Substituting each solution back into the original equation to catch errors such as sign mistakes.
Topics that use Checking solutions by substitution
- Solving equations and inequalities (AQA GCSE)
Related terms
- collecting like terms
- completing the square
- Convergence
- Exact surd solutions
- Factorising quadratic expressions
- Graphical representation of inequalities
- Inequality notation and direction
- Iteration
Using Checking solutions by substitution in the exam
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