Solving cubic equations

Sample Solving cubic equations questions

A few of the 5 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 13 marksGrade 7
   Solve $x^3 - 4x^2 + 4x = 0$, stating any repeated root. [3]
   Show the worked solution

What are the common mistakes in Solving cubic equations?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Assumes a single given linear factor of a cubic (or higher-degree) polynomial accounts for all its roots, without checking the remaining factor for further real roots

  Only ONE linear factor, $(x-1)$, was given - the remaining factor is a QUADRATIC, $x^2-2x+2$

Quick answers about Solving cubic equations

How many Solving cubic equations practice questions are there?

There are 5 self-marking Additional Maths Maths questions on Solving cubic equations, written for Cambridge IGCSE Additional Maths (0606) across Single tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Solving cubic equations?

No. You can start practising Solving cubic equations straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.