HP 50g Graphing Calculator - Manual (Page 209)

Page 6-3
The screen shot shown above displays two solutions. In the first one, β 4
-5 β
=125, SOLVE produces no solutions { }. In the second one, β 4
- 5 β = 6, SOLVE
produces four solutions, shown in the last output line. The very last solution is
not visible because the result occupies more characters than the width of the
calculator’s screen. However, you can still see all the solutions by using the
down arrow key (˜), which triggers the line editor (this operation can be
used to access any output line that is wider than the calculator’s screen):
The corresponding RPN screens for these two examples, before and after the
application of function SOLVE, are shown next:
Use of the down-arrow key (˜) in this mode will launch the line editor:
Function SOLVEVX
The function SOLVEVX solves an equation for the default CAS variable
contained in the reserved variable name VX. By default, this variable is set to
‘X’. Examples, using the ALG mode with VX = ‘X’, are shown below: