MathsYears 10–11Algebra

Quadratic formula

Solve quadratic equations using the quadratic formula; interpret the discriminant

What you'll learn

  1. 1

    Imagine you have a rocket 🚀 that follows a curved path. The quadratic formula helps you find when it hits the ground!

  2. 2

    What does the quadratic formula help us find?

  3. 3

    Let's solve x² + 5x + 6 = 0 together using the formula!

  4. 4

    Now you try! Solve 2x² + 7x + 3 = 0. Drag the numbers to fill in the formula.

  5. 5

    For the equation 2x² + 7x + 3 = 0, what is the value of 'a'?

  6. 6

    What is the discriminant (b² - 4ac) for 2x² + 7x + 3 = 0?

  7. 7

    The solutions to 2x² + 7x + 3 = 0 are x = -0.5 and x = …?

Practise Quadratic formula with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 14–16. Aligned to the UK National Curriculum.