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Cambridge IGCSE Additional Mathematics

3.2-3.3Factors of polynomials and cubic equations

Factors of polynomials and cubic equations in Cambridge IGCSE Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic41 practice questions2 lessons
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Learning objectives

What the syllabus expects you to be able to do.

  1. 3.2Find factors of polynomials, obtaining a linear and a quadratic factor of a cubic by observation or long division.
  2. 3.3Solve cubic equations.

Lessons

  • Factorising cubics and solving cubic equations

    40 min

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  • Polynomials: terms, operations and long division

    35 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Factors of polynomials and cubic equations: sample question

1 mark

How many real roots does the equation (x−1)(x2+x+5)=0(x - 1)\left(x^{2} + x + 5\right) = 0 have?

Only if the answer has a unit, e.g. cm or km/h.

Turn Factors of polynomials and cubic equations into a strength.

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