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Question 4

The line y=mx−2y = mx - 2y=mx−2 is a tangent to the circle x2+8x+y2−4y+7=0x^2 + 8x + y^2 - 4y + 7 = 0x2+8x+y2−4y+7=0.

Find the two possible values of mmm, giving your answers in exact form.

[7]
Markscheme

Circles Questions

  1. A Level
  2. /Maths
  3. /Circles

292 exam-style questions on Edexcel A Level Maths Circles, covering 6.1 Midpoints and Perpendicular Bisectors, 6.2 Equation of a Circle, 6.3 Intersections of Straight Lines and Circles, 6.4 Use Tangent and Chord Properties, and 6.5 Circles and Triangles. Each one has a worked solution and a mark scheme showing where the marks go.

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