How do you calculate the constant inside the square bracket when completing the square for x2+bxx^2 + bxx2+bx?
Halve 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.