The equation x2−5x+k=0x^2 - 5x + k = 0x2−5x+k=0 has repeated roots. Find the exact value of the constant kkk.
211 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.