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HP -28S Manual Page 115

Advanced scientific calculator.
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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

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