Scheitelkoordinaten

a = 1 (slider from -5 to 5, step 0.05)
b = 0 (slider from -5 to 5, step 0.05)
c = 0 (slider from -5 to 5, step 0.05)
f(x) = (a * x^(2)) + (b * x) + c
S = Extremum(f)
Text3 = Text(((-b)) / 2 / a)
Text1: "x_S=-\frac{b}{2a}=" + (LaTeX[Text3]) + ""
Text4 = Text(((-b^(2))) / 4 / a + c)
Text2: "y_S=-\frac{b^2}{4a}+c=" + (LaTeX[Text4]) + ""