Write x2−2x−1x^2 - 2x - 1x2−2x−1 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.
Hence, or otherwise, write down the coordinates of the turning point of the graph of y=x2−2x−1y = x^2 - 2x - 1y=x2−2x−1
Practise CIE IGCSE Maths Completing the Square with exam-style questions for Core and Extended tier. 14 questions, matched to the CIE IGCSE Maths (0580) specification and written in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.