Solve w/ HP-41 Formula Eval Module

[Gene]

Ah, sorry, now I see it. Question might help someone else who does not.

EVALT will evaluate the formula in ALPHA "X+Y" or "X+T/Y" or whatever, using the values in the indicated stack registers and overwrite the value computed into the T register. Same with EVALZ etc. but in this case, the object is to find the root of X with guesses in X and Y.

Therefore, EVALZ will take X and compute the function value, followed by X<>Y EVALT which will compute the function value using the second guess originally in Y.

My confusion was thinking EVALZ would take the value of Z as the "X" for the evaluation and store the result in Z. That's not correct of course.