The line y=mx−2y=mx-2y=mx−2 is a tangent to the circle x2+6x+y2−8y+5=0x^2+6x+y^2-8y+5=0x2+6x+y2−8y+5=0.
Find the two possible values of mmm, giving your answers in exact form.
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.