f(x) = x^(2) + x - 6
a = 1 (slider from -3 to 3, step 0.1)
b = -1 (slider from -5 to 5, step 0.1)
c = -6 (slider from -9 to 9, step 0.1)
p2(x) = (a * x^(2)) + (b * x) + c