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2.4 The Discriminant

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Question 13

The equation (k2+4)x2+8x+2=0(k^2 + 4)x^2 + 8x + 2 = 0(k2+4)x2+8x+2=0, where k k\,k is a constant, has two distinct real solutions for xxx.

a.

Find the discriminant of the quadratic equation in terms of kkk.

[2]
b.

Hence find the set of possible values for kkk.

[5]
Markscheme

2.4 The Discriminant Questions

  1. A Level
  2. /Maths
  3. /2.4 The Discriminant

49 exam-style questions on Edexcel A Level Maths 2.4 The Discriminant. Each one has a worked solution and a mark scheme showing where the marks go.

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