Finding the roots in a quadratic function

Thus, the roots of a quadratic function are given by, This formula is called the quadratic formula, and its derivation is included so that you can see where it comes from. We call the term b2 −4ac the discriminant. The discriminant is important because it tells you how many roots a quadratic function has. 
1. b2 −4ac < 0 There are no real roots. 2. b2 −4ac = 0 There is one real root. 3. b2 −4ac > 0 There are two real roots.