f(x) = x4 - x3 + x2 - x + 1
g(x) = 7x2 - x + 1
d(x) = f(x) - g(x) = x4 - x3 - 6·x2
D(x) = 0.2·x5 - 0.25·x4 - 2·x3
Schnittpunkte von f(x) und g(x) --> d(x) = 0
x4 - x3 - 6·x2 = 0 --> x = 3 ∨ x = -2 ∨ x = 0 (d.N.)
D(-2) - D(-3) = 20.45
D(3) - D(-2) = -31.25
A = 20.45 + 31.25 = 51.7 FE