a = 2 (slider from -5 to 5, step 1)
c = 3
f(x) = sqrt((((a + x) * x^(2)) + c) / (a - x))
f'(x) = f'(x)
f_1(x) = (-f(x))
g: x = 2
f''(x) = f''(x)
b(x, y) = ((a + x) * x^(2)) - ((a - x) * y^(2)) + c
f_1'(x) = f_1'(x)
hut(x) = ((a + x) * x^(2))
hut'(x) = hut'(x)
A, B = Extremum(hut)