test
Author: Ne vem

f(x) = a x² + b x + c

x_{1}

x_{2}

D = b² - 4 a c

a = 0.4 (slider from -5 to 5, step 0.1)
b = -0.4 (slider from -5 to 5, step 0.1)
c = -0.2 (slider from -5 to 5, step 0.1)
f(x) = a * x^(2.0) + b * x + c
A, B = Intersect(f, xAxis)
D: b^(2.0) - 4.0 * a * c
tekst1: "D = " + D
C = (1.0E9, 0)
d = Ray(B, C)
E = (-1.0E9, 0)
e = Ray(A, E)
F = Point(xAxis)
G = Point(xAxis)
g = Line(F, G)
h = Segment(A, B)
i = Ray(A, C)