In the expansion (x+r)2=x2+2rx+r2(x+r)^2 = x^2 + 2rx + r^2(x+r)2=x2+2rx+r2, how is the number inside the bracket (rrr) related to the xxx coefficient?
It is equal to the coefficient of xxx.
It is half the coefficient of xxx.
It is twice the coefficient of xxx.
It is the square of the coefficient of xxx.
Flashcards for Edexcel GCSE Maths Completing the Square, covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 22 cards, matched to the Edexcel GCSE Maths (1MA1) specification.
