Knaph
Explore

Quadratic equations

Equations like ax² + bx + c = 0. They can have two, one or no real solutions, found with factoring or the quadratic formula.

Depth 1 · Foundation

You can solve quadratics by factoring and with the quadratic formula.

Sign in to prove what you know with a short quiz, see how deep you've gone, and earn XP for it.

Sign in with Google

Depths of understanding

  1. 1

    Foundation

    You can solve quadratics by factoring and with the quadratic formula.

    Opens after

    Linear equations
  2. 2

    Deeper

    You know that "no real solution" really means two complex solutions - every quadratic has exactly two roots.

    Master depth 1 first

    Complex numbersWhen the discriminant is negative the roots don't vanish - they move off the real line into the complex plane.

Your path here

What's still between you and Quadratic equations, depth 1, in the order you can learn it.

  1. 1CountingDepth 1 · Foundation · Number Systems
  2. 2Natural numbersDepth 1 · Foundation · Number Systems
  3. 3ZeroDepth 1 · Foundation · Number Systems
  4. 4The number lineDepth 1 · Foundation · Number Systems
  5. 5NumeralsDepth 1 · Foundation · Number Systems
  6. 6Place valueDepth 1 · Foundation · Number Systems
  7. 7Comparing numbersDepth 1 · Foundation · Number Systems
  8. 8IntegersDepth 1 · Foundation · Number Systems
  9. 9VariablesDepth 1 · Foundation · Algebra
  10. 10Linear equationsDepth 1 · Foundation · Algebra
  11. 11Quadratic equationsDepth 1 · Foundation · Algebra

Where it fits

Builds on

Linear equations

This concept

Quadratic equationsAlgebra