I am working with matrices in maple, and just have a couple questions.

a) how do you make a matrix value "symbolic", and what does this mean (ie: i have a variable "j" in one of the matrices that I need to make symbolic).

b) when I go to do simple matrix arithmatic, and it doesn't compute, I get long errors.  How should I go about cleaning up these errors for the final document that I am creating?  Also, when do you need to call on the "linear algebra" code/package, and how do you go about doing this?

Thanks

Hey,

I am trying to solve a polynomial function for which there should be two solutions for x (it is just a standard x^2 +ax +a type equation, but I am a complete newb to maple and can only seem to get one solution for x.  Can you please tell me exactly what I need to enter to get all solutions for x.

Thanks

Hey,

I am trying to make a 3D plot of the following, but when I enter it, I am only getting the option to do a 2D Implicit plot for some reason.  Can you please tell me exactly what I need to enter, so I can make a 3D plot?

G(x, y) = e^(sinx) * cos(y)sin(xy)

Thanks...