# HP -32S Owner's Manual Page 198

Rpn scientific calculator.

According to Newtonian mechanics, this problem may be expressed
as a second degree polynomial, where T is time in seconds.
Keys:
f(T) = (-9.81 +• 2)7* + 20T + 2
Display:
Description:
|XEQ|Q
2 0
Revalue
B?value
equation program.
9.81 I+/-II ENTER I
IR/SI
Stores (-9.81/2) in A.
20 |R/S|
C?value
Stores 20 in B.
2|R/S|
X=4.1751
Stores 2 in C and cal
culates X (which in this
case is also known as
T).
| R/S |
X=-0.0977
Calculates the other
root.
Note that since a negative time has no meaning in the context of this
problem, the first result, 4.1751 seconds, is the meaningful answer.
.Example 4. Find the roots of the following second-degree polyno
mial using the program as it is listed. Then change the sense of the
comparison at line Q12 so that the second root is computed first and
then the results are compared. Remember to restore the original line
or clear the program when you finish this example.
Keys:
XEQl Q
1[M]
3(T|6[r7s]
1 iR/sl
x2 + (3 x 106)* +1 = 0
Display:
Description:
lvalue
Starts program.
B?value
Stores 1 in A.
C?value
Stores 3 x 106 in B.
X=-3,008,000,00
Stores 1 in C and cal
culates the first root.
196
12: Mathematics Programs  