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Quadratics

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Question 81
a.

Complete the square for x2−4x+6x^2 - 4x + 6x2−4x+6.

[1]
b.

Hence show that x2−4x+6>0x^2 - 4x + 6 > 0x2−4x+6>0 for all real values of xxx.

[2]
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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