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Quadratics

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Question 111
a.

By completing the square, find in terms of the constants p p\,p and k k\,k the roots of the equation

x2+px+k=0 x^2+px+k=0 x2+px+k=0

where k k\,k is a positive constant.

[3]
b.

Hence find the set of values of p p\,p in terms of k k\,k for which the equation has no real roots.

[1]
Markscheme

Quadratics Questions

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

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.

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