hi i worked out a matrix of this form
call lambda x
(2-x ) 0 3
0 (6-x) -3
3 -3 (2-x)
and that formula below was what i got
-x^3 + 10x^2 - 10x - 48
but this doesnt look right as i cant find the roots. I would be really grateful if someone would verify i have worked it out correctly.