Solving cubic inequalities

Sample Solving cubic inequalities questions

A few of the 4 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 13 marksGrade 8
   Solve $(x-1)(x-3)(x+2) \geq 0$. [3]

What are the common mistakes in Solving cubic inequalities?

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.

• When solving a polynomial inequality from its roots, applies the sign pattern between regions in reverse instead of testing a point in each region

  For a positive cubic with three distinct roots, the sign alternates through each region - testing a value in each region (e.g. $x=-3,0,2,4$) confirms the curve is $\geq 0$ on $-2 \leq x \leq 1$

Quick answers about Solving cubic inequalities

How many Solving cubic inequalities practice questions are there?

There are 4 self-marking Additional Maths Maths questions on Solving cubic inequalities, 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 inequalities?

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