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The polynomial root-finder, Entering and solving a polynomial, The polynomial root-finder - v – Texas Instruments TI-86 User Manual

Page 223

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Chapter 15: Equation Solving

211

15EQSOLV.DOC TI-86, Chap 15, US English Bob Fedorisko Revised: 02/13/01 2:34 PM Printed: 02/13/01 3:04 PM Page 211 of 12

15EQSOLV.DOC TI-86, Chap 15, US English Bob Fedorisko Revised: 02/13/01 2:34 PM Printed: 02/13/01 3:04 PM Page 211 of 12

The Polynomial Root-Finder

- v

The root finder solves up to 30th-order real or complex polynomials.

Entering and Solving a Polynomial

ᕡ Display the

POLY

order screen.

ᕢ Enter an integer between 2 and 30. The

coefficients-entry editor is displayed with the
equation across the top, the coefficient
prompts along the left side, and the

POLY

ENTRY

menu on the bottom.

- v

4

b

ᕣ Enter a real or complex value (or an expression

that resolves to one) for each coefficient.

To clear all coefficients, select

CLRa

from the

POLY

ENTRY

menu.

18

#

5

#

21

#

7

#

16

ᕤ Solve the equation. The roots of the polynomial

are calculated and displayed. Results are not
stored to variables and you cannot edit them.
Also, the

POLY

RESULT

menu is displayed.

Results can be complex numbers.

*

The POLY coefficients are not
variables.

You can display other menus
in the coefficients-entry
editor.

Ellipses indicate that a value
continues beyond the screen.
Press

"

and

!

to scroll the

value.