Simultaneous equations (OCR GCSE Maths): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Simultaneous equations involve
Simultaneous equations involve
Two equations with two unknown letters
Key requirement for solutions
Key requirement for solutions
Values must make both equations balance
Standard format for simultaneous eqs
Standard format for simultaneous eqs
Purpose of aligning equations
Purpose of aligning equations
To line up unknown letters vertically
Key letter definition
Key letter definition
Variable chosen to eliminate
When to subtract equations
When to subtract equations
When key letters have same sign
When to add equations
When to add equations
When key letters have opposite signs
After finding first variable
After finding first variable
Substitute back into original equation
Final step in solving
Final step in solving
Check answer in both equations
Making coefficients same for key letter
Making coefficients same for key letter
Multiply equations if needed
First step: quadratic simultaneous eqs
First step: quadratic simultaneous eqs
Re-arrange linear eq to isolate variable
After isolating in linear equation
After isolating in linear equation
Substitute into quadratic equation
Solutions from quadratic simultaneous
Solutions from quadratic simultaneous
Two possible values