Write x2+4x+12−(x+3)x^2 + 4x + 12 - (x + 3)x2+4x+12−(x+3) in the form
(x+32)2+274 \left(x + \frac{3}{2}\right)^2 + \frac{27}{4} (x+23)2+427211 exam-style questions on Edexcel A Level Maths Quadratics, covering 2.1 Solving Quadratics, 2.2 Completing the Square, 2.3 Sketching Quadratic Graphs, 2.4 The Discriminant, and 2.5 Modelling with Quadratics. Each one has a worked solution and a mark scheme showing where the marks go.