k = 0.9
r = 1.5
a = 0
g(x) = ((x^(2) - r^(2) + k^(2)) * (x - a - k^(2)))
kk: (k * k)
gk(x) = ((x^(2) - r^(2) + kk^(2)) * (x - a - kk^(2)))
Liste1 = Sequence(((x^(2) - r^(2) + kk^(2)) * (x - a - kk^(2))), kk, 0, 2, 0.1)
A, B = Extremum(g)