Intelligent result checking before asking positive/negative/zero...?

Is there anyway to tell Maxima to try all possibilities and give all 
answers rather than asking questions such as "is x positive negative or 
zero?"?

That is, firstly, can I instruct maxima to produce a table showing all 
the results for each option, but secondly, and more importantly, in many 
occassions it doesn't actually matter what the answer is (that is, the 
final result is the same regardless of whether I say positive negative 
or zero).  In this second case it would be nice if Maxima just didn't 
ask at all, since it actually doesn't make any difference.


-- 
edA-qa mort-ora-y
Idea Architect
http://disemia.com/