What is a discriminant as used in math?

For a quadratic equation in the form
ax^2 + bx + c = 0
the discriminant D is found by this formula
D = b^2 - 4ac

It's useful to determine how many and what type of solutions we have for x
If D > 0, then we have two different real number solutions
If D = 0, then we have exactly one real number solution
If D < 0, then we have no real solutions (if you learned about complex or imaginary numbers, then you would say you had two complex or imaginary solutions)

Oh yeah yeah the answer is oh yeah yeah

Cbecause they are equal so that means it is the same on both sides? ! hope this