Some issues solving linear equation

[Manolo Sobrino]

Look at page 18-12 of the HP 48G user's guide. For overdetermined systems the linear system solver will return the least-squares solution. For underdetermined systems it will return the minimum norm solution.

It won't warn the user so you have to check the system of equations before. I've always considered the HP 48 family of calculators a great supplement to their manuals.