The Quadratic Formula

Sample The Quadratic Formula questions

A few of the 50 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 12 marksGrade 6
   Solve $3x^2 + 5x - 1 = 0$ algebraically. Give your solutions correct to 2 decimal places.
   Show the worked solution

   x = [−5 ± √(5² − 4×3×(−1))] / (2×3) = [−5 ± √37] / 6. M1

What are the common mistakes in The Quadratic Formula?

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.

• Gives only one root of a quadratic equation instead of both

  Only used the $+$ case of $\pm\sqrt{24}$ - the quadratic formula gives two solutions, one from $+\sqrt{24}$

Quick answers about The Quadratic Formula

How many The Quadratic Formula practice questions are there?

There are 50 self-marking GCSE and IGCSE Maths questions on The Quadratic Formula, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Higher and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise The Quadratic Formula?

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