HP HP-28S - Page 115

Display the first row of manipulations for +.
[ NEXT I .-----------------,
««A*X);(A*B))+(2*X))=
C)
.. KDlllmlmaI ....
The manipulations that appear when you press [ NEXT I are specific to
the function or variable indicated by the cursor; these manipulations
are specific to +.
Commute the arguments to +, using ++ (commute).
Return to the main FORM menu.
[ENTER I
Step 2: Associate ax and 2x.
Move the cursor to the second +
[ot] [ot]
[ot]
[ .. ]
Here you want to act on the sub expression
CCCAtB)+CAtX»+C2tX»
to associate the terms CAt;.-;) and C 2 t X) in a single subexpression.
Display
the first row of manipulations for + .
I NEXT I
.--------------------------~
These are the same manipulations as before because the cursor again
indicated an additive subexpression.
114 9: Symbolic Solutions