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Example: Evaluating an Expression. Evaluate the expression:
eXtytz
forx=1,y=2, and z = 2.5.
Keys:
Display:
Description:
B(EQUATIONS]
If necessary, press [¥] until the HP-22S displays TYPE NEW EGHN.
Then:
X
Y
Types the expression.
(+](s10]) Z (1)
EXP(X+Y+2)
X?value
Prompts for X.
1
Y ?value
Stores X, prompts for
Y.
2
Z?value
Stores Y, prompts for
Z.
2.5
EXPR=244.6919
Evaluates the
expression.
Hints for Responding to Prompts
Calculating Input Values. You can do calculations in response to
prompts. For example, in response to the prompt A?value, pressing 7
4
stores 9 in A. Similarly, in response to B?value, press-
ing 5 [(:] 8 M %CHG](INPUT] stores 60 in B. (Notice that [[:]is used
to display the colon to separate the two arguments of the percent
change function.)
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6: Evaluating and Solving Equations
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