Express 5x2−15x+85x^2 - 15x + 85x2−15x+8 in the form a(x+b)2+ca(x + b)^2 + ca(x+b)2+c
State the coordinates of the minimum point of the curve y=5x2−15x+8y = 5x^2 - 15x + 8y=5x2−15x+8
State the equation of the normal to the curve y=5x2−15x+8y = 5x^2 - 15x + 8y=5x2−15x+8 at its minimum point.
322 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.