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2.4 The Discriminant

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Question 9
a.

The equation x2+kx+2=0x^2 + kx + 2 = 0x2+kx+2=0, where k k\,k is a constant, has no real roots.

Show that the discriminant of the equation is k2−8k^2-8k2−8.

[1]
b.

Hence find the set of possible values for kkk.

[3]
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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