Question

what is the quadratic formula?

Answer 1

Do you need the definition?

Answer 2

no, the actual formula that is used

Answer 3

Okay, so what's the problem?

Answer 4

do you think on discriminant ?

Answer 5

D = b^2 -4ac

x_1,2 = (-b+/- sqrt(D) )/2a

or you think this way ?

Answer 6

Here you go
\[x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]