GCSE Maths (Edexcel)

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Manipulating Inequalities

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Algebra Solving Equations and Inequalities

Manipulating Inequalities

4:26 Introduction to Inequalities
Spec A22
Previous Deriving Equations Next Solving Linear Inequalities
  • Inequalities can be manipulated like equations by adding or subtracting from both sides of the inequality
  • Inequalities can also be manipulated like equations by multiplying or dividing both sides by the same positive number
  • When multiplying or dividing by a negative number, the inequality sign must be reversed
  • Forgetting to reverse the inequality sign when multiplying or dividing by a negative number is a common source of error

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