HP 33S, User Manual

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Mathematics Programs
15–31
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
Example 2:
Find the roots of 4 x
4
– 8 x
3
– 13 x
2
– 10 x + 22 = 0. Because the coefficient of the
highest–order term must be 1, divide that coefficient into each of the other
coefficients.
Keys:
(In RPN mode)
Display: Description:
t
P

value

Starts the polynomial root finder;
prompts for order.
4
¥

value 
Stores 4 in F ; prompts for D .
8
z Ï
4
¯ ¥


value
Stores –8/4 in D ; prompts for C.
13
z Ï
4
¯ ¥


value
Stores –13/4 in C . prompts for B.
10
z Ï
4
¯ ¥


value
Stores –10/4 in B ; prompts for A.
22
Ï
4
¯
¥


 Stores 22/4 in A ; calculates the
first root.
¥


Calculates the second root.
¥


Displays the real part of the third
root.
¥


Displays the imaginary part of the
third root.
¥


Displays the real part of the fourth
root.
¥


Displays the imaginary part of the
fourth root.
The third and fourth roots are –1.00 ± 1.00 i .