Cambridge IGCSE Mathematics
2.5Equations
Equations in Cambridge IGCSE Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic100 practice questions6 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 2.5.1Form expressions, equations and formulas from information given in words or diagrams.
- 2.5.2Solve linear equations in one unknown, including equations with brackets and fractions.
- 2.5.3Solve a pair of simultaneous linear equations in two unknowns.
- 2.5.4Extended: solve simultaneous equations in which one equation is linear and the other is not.
- 2.5.5Extended: solve quadratic equations by factorising.
- 2.5.6Extended: solve quadratic equations by completing the square and by using the quadratic formula, giving answers to a stated degree of accuracy.
- 2.5.7Change the subject of a formula (Core: the subject appears once and not as a power or root).
- 2.5.8Extended: solve equations with fractions that have numerical or linear algebraic denominators.
Lessons
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Changing the subject of a formula
35 min
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Completing the square and the quadratic formula
35 min
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Linear equations
35 min
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Simultaneous equations with one non-linear equation
30 min
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Simultaneous linear equations
35 min
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Solving quadratic equations by factorising
25 min
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Sample question
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