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 x5 x4 – 101x3 +101x2 + 100x – 100 = 0.

Keys:

Display:

Description:

(In RPN mode)

 

 

XP

@

 

value

5 g

@

 

value

1 ^g

@

 

value

101 ^g

@

 

value

101 g

@

 

value

100 g

@

 

value

100 ^g

%/

 

)

g%/

.)

g%/

.)

g%/

)

g%/

)

Starts the polynomial root finder; prompts for order.

Stores 5 in F; prompts for E.

Stores –1 in E; prompts for D.

Store –101 in D. prompts for C.

Stores 101 in C; prompts for B.

Stores 100 in B; prompts for A.

Stores –100 in A; calculates the first root.

Calculates the second root.

Displays the third root.

Displays the fourth root.

Displays the fifth root.

15–30Mathematics Programs