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15–30 Mathematics Programs
A through E Coefficients of polynomial; scratch.
F Order of polynomial; scratch.
G Scratch.
H Pointer to polynomial coefficients.
X The value of a real root, or the real part of complex root
i The imaginary part of a complex root; also used as an index
variable.
Example 1:
Find the roots of x
5
– x
4
– 101x
3
+101x
2
+ 100x – 100 = 0.
Keys:
(In RPN mode)
Display: Description:
X
P
@
value
Starts the polynomial root finder;
prompts for order.
5
g
@
value
Stores 5 in F; prompts for E.
1
^g
@
value
Stores –1 in E; prompts for D.
101
^g
@
value
Store –101 in D. prompts for C.
101
g
@
value
Stores 101 in C; prompts for B.
100
g
@
value
Stores 100 in B; prompts for A.
100
^g
%/
)
Stores –100 in A; calculates the
first root.
g
%/
.)
Calculates the second root.
g
%/
.)
Displays the third root.
g
%/
)
Displays the fourth root.
g
%/
)
Displays the fifth root.