Absolute value: sometimes CAS is very clever, sometimes not!

[jfdHP]

Thank you very much for your responses.

TW: In fact in my experience "simple" stuffs are generally solved by HP Prime. Simple problems that are not solved are generally very specific problems. I understand very well the philosophy that these specific problems are not a priority for a CAS.

Please note that even if the example I gave was quite simple, the original problems are in fact much more complicated. I only pinpointed the problematic stage in the calculation. I checked that if we overcome the difficulty by doing the absolute value simplification by hands, HP prime can solve the entire (complicated) physical problem.

toml_12953: There is no bug in the calculator. You still can trust the calculator's answer. The trouble is that there is a set of interesting problems in physic and chemistry where HP cannot help a lot because of the impossibility of simplifying theses absolute values.

parisse: Thanks for the response ; I sent you an email