Did you use the delta (Δ) when solving quadratic equations?

In memes about the "uselessness" of high school math skills, foreign memes tend to use this formula for calculating the roots of a quadratic equation:

x = (-b ± √ (b² – 4ac) ) / 2a

However in Poland the formula would always be:

x = (-b ± √Δ ) / 2a

Because we would first calculate the discriminant (so called delta):

Δ = b² – 4ac

So did you use to calculate the discriminant first or just use a single formula?

Here are the official math tables students use during their high school exams showing the use of delta.