MathsYears 10–11Algebra
Quadratic formula
Solve quadratic equations using the quadratic formula; interpret the discriminant
What you'll learn
- 1
Imagine you have a rocket 🚀 that follows a curved path. The quadratic formula helps you find when it hits the ground!
- 2
What does the quadratic formula help us find?
- 3
Let's solve x² + 5x + 6 = 0 together using the formula!
- 4
Now you try! Solve 2x² + 7x + 3 = 0. Drag the numbers to fill in the formula.
- 5
For the equation 2x² + 7x + 3 = 0, what is the value of 'a'?
- 6
What is the discriminant (b² - 4ac) for 2x² + 7x + 3 = 0?
- 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.