Help with imaginary number output from CAS

[Nigel (UK)]

(06-15-2014 11:35 PM)Rich Wrote:  Hi, when "complex" option in the CAS settings is checked, I am getting a "_x" in the output. Is this the correct result and should interpret this as something significant?

I think this was seen in an another error earlier but I am unsure if this is what should be expect when having this setting checked.



I have attached a screenshot that has both results, the first with the "complex" checked and the second with it off.

Thanks if anyone knows the answer.

My guess: _x is a free real variable. In other words, for any real value of _x there are two roots for w, given by those two complex expressions.

Nigel (UK)