HP (Hewlett-Packard) 48gII Calculator User Manual


 
Page 6-10
In RPN mode, enter the equation between apostrophes and activate command
STEQ. Thus, function STEQ can be used as a shortcut to store an expression
into variable EQ.
Press
J
to see the newly created EQ variable:
Then, enter the SOLVE environment and select Solve equation…, by using:
‚Ï
@@OK@@. The corresponding screen will be shown as:
The equation we stored in variable EQ is already loaded in the Eq field in the
SOLVE EQUATION input form. Also, a field labeled x is provided. To solve
the equation all you need to do is highlight the field in front of X: by using
˜
, and press
@SOLVE@
. The solution shown is X: 4.5006E-2:
This, however, is not the only possible solution for this equation. To obtain a
negative solution, for example, enter a negative number in the X: field before
solving the equation. Try
3\
@@@OK@@
˜
@SOLVE@. The solution is now X: -
3.045.