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Equations and Inequalities

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Question 73
a.

Show that (x+4)(x+2)<15(x + 4)(x + 2) < 15(x+4)(x+2)<15 can be written as x2+6x−7<0x^2+6x-7<0x2+6x−7<0.

[1]
b.

Hence find the set of values of x x\,x for which

(x+4)(x+2)<15 (x + 4)(x + 2) < 15 (x+4)(x+2)<15
[3]
Markscheme

Equations and Inequalities Questions

  1. A Level
  2. /Maths
  3. /Equations and Inequalities

206 exam-style questions on Edexcel A Level Maths Equations and Inequalities, covering 3.1 Linear Simultaneous Equations, 3.2 Quadratic Simultaneous Equations, 3.3 Simultaneous Equations on Graphs, 3.4 Linear Inequalities, 3.5 Quadratic Inequalities, and 3.6 Inequalities on Graphs. Each one has a worked solution and a mark scheme showing where the marks go.

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