HP 48g Graphing Calculator - Manual (Page 209)

and B contains the expression
D, E, and C.
;E) ' , you will see labels for el,
Note For equations that use a placeholder variable—
such as an integral, summation, or derivative, the
placeholder variable will have a label displayed.
However, you will not be able to solve for a
placeholder variable.
If one or more of the variables does not already exist, it will be created
and added to the current directory when you solve the equation the
first time.
To enter a value for a known variable:
1, Move the highlight to the field labeled with the name of the known
variable,
2. Type in the value and press (ENTER),
To Store an estimated value for an unknown variable:
1, Move t.he highlight to the field labeled with the name of the
unknowm variable.
2. Type in the guess value and press f ENTER),
18
To solve for an unknown variable:
1, Move the highlight to the field labeled with the name of the
unknown variable,
2, Press S O L V E . The result wull be displayed in the field and a
labeled copy put on the stack.
Interpreting Results
The SOLVE application returns a message describing the result of the
root-finding process. You can use this message and other information
to judge whether the result is a root of your equation.
To interpret the comput ilt:
After the result has been computed, press I N F O . Press
to clear it when you’ve finished viewing it.
Solving Equations 18-3