Solve App and ABS() and IP()

[cyrille de brébisson]

Hello,

In Solve app,
When solving a single equation, Prime uses a numerical Zero finder (inherited from the HP48 and previous calculators).
When solving multiple equations, it uses the CAS.

This has 2 side effects:
1) the CAS is not great at dealing with discontinuities in solving (Discontinuities are very hard!)
2) Cas version of the functions are used, nor numerical ones. As a general rules, this is not a problem as they yield identical results. But this is only a general rules as some edge cases for lesser used function might differ.

Cyrille