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Quadratics

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Question 16
(a).

f(x)=2x2+12x+5f(x) = 2x^2 + 12x + 5f(x)=2x2+12x+5

Show that

f(x)=2(x+3)2−13 f(x) = 2(x + 3)^2 - 13 f(x)=2(x+3)2−13
[2]
(b).

Hence find the values of the constants aaa, b b\,b and c c\,c such that

f(x)=a(x+b)2+c f(x) = a(x + b)^2 + c f(x)=a(x+b)2+c
[1]
Markscheme

Quadratics Questions

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

211 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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