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To enter your guess(es):
1. If the HP-22S is displaying the equation, press [C].
2. Store a guess in the unknown variable. For example, if the un-
known is X, 2
X stores 2 as a guess.
3. If you want to use a second guess, key in the value. (If you don't
do this step, there is only one guess, since the variable and dis-
play contain the same number.)
4. Proceed with step 2 under "Instructions for Using
" on
page 77.
Example: Using Guesses. Part 1: How long does it take an object
with an initial velocity of 10 meters/second accelerating at 2
meters/second? to travel a distance of 1000 meters? (Use the library
equation X=S+VXT+5XAXT"2.)
Keys:
Display:
Description:
M(LIBRARY]
Displays the library.
If necessary, press [¥] until the HP-22S displays the beginning of the
equation. Then:
10
T
T=10.0000
Enters one guess.
50 @[SOLVE]
AST
VX
Enters second guess.
{T}
X?value
Selects T, prompts for
X.
1000
S?value
Stores X, prompts for
S.
0
V?value
Stores initial position
of 0, prompts for V.
10
A?value
Stores V, prompts for
A.
2
T=27.0156
Solves for T.
88
6: Evaluating and Solving Equations
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