a = 0.20000000000000018 (slider from -5 to 5, step 0.1)
b = -1.2999999999999998 (slider from -5 to 5, step 0.1)
c = -1.9 (slider from -5 to 5, step 0.1)
P: y = a x^(2) + b x + c
A = Intersect(P, xAxis, 2)
B = Intersect(P, xAxis, 1)
Δ: b^(2) - 4 a c