The is the name of the number under the radical symbol in the quadratic formula.

In a quadratic equation, the discriminant helps us to find  the number of real solutions to a quadratic equation. The expression used to find the discriminant is the expression located under the radical in the quadratic formula.The discriminant is given by

It is denoted by D.

The Discriminant  is the name of the number under the radical symbol in the quadratic formula.