HP50G Complex Number CAS manipulations

[Hammonds]

Yes, I'm in complex mode, but thanks for the shortcut.

I must be doing something stupid somewhere, as ABS still doesn't expand the expression, and when I do:

'z^2 − z' 'z' SOLVE

I just get:
{z=0 z=1}

I changed flag 128, but no difference.

I'm asking this because in that document, the author goes on to list a program that allows numerical solving on complex variables - which sounds very interesting, but it hinges on substituting parts of the expression that is expanded by ABS.

Thanks