Løsning:
k = 5, x = 9
k = 5, x = 5
k = 4, x = 6
k = 1, x = 3
k = 0, x = 4
k = 0, x = 0
Rot for x:
x = -sqrt(k^2-5 k+4)+k+2
x = sqrt(k^2-5 k+4)+k+2
Implisitt derivat:
((partial d)k(x))/((partial d)x) = (2 (2+k-x))/(9-2 x)
((partial d)x(k))/((partial d)k) = (9-2 x)/(4+2 k-2 x)