How do you calculate the constant inside the square bracket when completing the square for x2+bxx^2 + bxx2+bx?
Square the coefficient bbb.
Double the coefficient bbb.
Halve the coefficient bbb.
Negate the coefficient bbb.
Flashcards for Edexcel IGCSE Maths Completing the Square, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 2. 1 card, matched to the Edexcel IGCSE Maths (4MA1) specification.