Version 1.0

a = 1.5 (slider from -5 to 5, step 0.1)
b = 1.8 (slider from -5 to 5, step 0.1)
f(x) = a * x^(2) + b
A = Point(f)
c = Tangent(A, f)
d = OrthogonalLine(A, c)
g = Factor(f)