Write x2+10x+9x^2 + 10x + 9x2+10x+9 in the form (x+a)2+b(x + a)^2 + b(x+a)2+b where a a\,a and b b\,b are integers, and hence write down the coordinates of the turning point of the graph of y=x2+10x+9y = x^2 + 10x + 9y=x2+10x+9
250 exam-style questions on OCR GCSE Maths Completing the Square. Each one has a worked solution and a mark scheme showing where the marks go.