M34 - Maths Lessons, Homework and Revision Site

Quadratic Formula and Discriminant

Lesson Objectives:

To be able to:

  • Use the quadratic formula to solve a quadratic equation giving roots as decimals or surds
  • Know that the discriminant of a quadratic expression is b2 - 4ac
  • Use the discriminant to determine how many roots a quadratic equation has.

Go Back