itseisarvoepäyhtälö_ esimerkki

f(x) = abs((2 * x) + 3)
g(x) = 4
A = Intersect(f, g, (-3.5, 4))
B = Intersect(g, f, (0.5, 4))
a(x) = f(x) < g(x)
b(x) = f(x) > g(x)