Looking good - keep going :-)
Make a suitable change of variables and hence transform to its canonical form. Heres goes...
The discrimant B^2-AC is = making it parabolic.
Check the determinant is not = 0 ie,
How am I doing so far?..
The derivatives are turning out to be a monster of a task! Particualrly t_xx
The term is 0
I have attached the derivation of t_xx
I have no idea where to start in order to simplify it. I am not sure if I will continue on with this unless I get some encouragement. I think its beyond the scope of a possible exam question!