Completing the Square (Edexcel GCSE Maths): Flashcards
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What technique transforms quadratics into perfect square form?
What technique transforms quadratics into perfect square form?
Completing the square
Standard quadratic form
Standard quadratic form
Completed square format with constants ,
Completed square format with constants ,
Step 2: Divide coefficient of by? Then write?
Step 2: Divide coefficient of by? Then write?
2, then write (x + rac{b}{2})^2
Purpose of Step 4 adjusting number
Purpose of Step 4 adjusting number
Adjust constant to match original expression
Most common completing the square error
Most common completing the square error
Forgetting the adjusting number
in completed square form
in completed square form
To solve after completing square, first...
To solve after completing square, first...
Move constant to other side
Taking square root of both sides gives
Taking square root of both sides gives
solutions
Adjusting number formula (when )
Adjusting number formula (when )
c - ( rac{b}{2})^2
When to use: quadratic doesn't...
When to use: quadratic doesn't...
Factorise easily