Mathematics A-Level
disguised equations
What disguised equations means in Mathematics A-Level, as defined for WJEC.
Definition of disguised equations
Check what you remember
Read the wording for your board, then hide it and explain disguised equations in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Equations that are quadratic in form, solved by substituting a temporary variable u = g(x) and reversing each root through the inverse function.
Topics that use disguised equations
- Algebra and Functions (AS Unit 1: Pure Mathematics A) (WJEC A-Level)
Related terms
- algebraic division
- Asymptotes
- boundary curves
- Completing the square
- conjunction
- critical values
- curve sketching
- dashed and solid lines
Using disguised equations 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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