Escape Game

a = 0.23 (slider from -0.5 to 0.5, step 0.01)
b = 0.53 (slider from -1 to 1, step 0.01)
c = 0.68 (slider from 0 to 5, step 0.02)
f(x) = If[-6 ≤ x ≤ 3, (a * x^(2)) + (b * x) + c]
A = (-6.130960750729112, -0.2226218854835706)
B = (-5.11592182204082, -0.23691820842284234)
C: (2.99561, 0.70)
D: (3.00439, 0.9)
E: (-0.065, 0)
F: (0.07, 0)
G_{1}: (-0.07, 2.56)
H: (0.07, 2.56)
G: (-6.00229, 0)
I = (2.9948587255060084, 3.7183978047756736)
J = Point(xAxis)
g = Line(I, J)
texte1: "f(x)=" + (LaTeX[a]) + "x^2+" + (LaTeX[b]) + "x+" + (LaTeX[c]) + ""