a=

b=

c=

a = 2 (slider from -10 to 10, step 0.1)
b = -1 (slider from -10 to 10, step 0.1)
c = -2 (slider from -10 to 10, step 0.1)
d: y = a * x^(2) + b * x + c
HộpChọnđầuVào1 = Textfield(a)
HộpChọnđầuVào2 = Textfield(b)
HộpChọnđầuVào3 = Textfield(c)