HP 39gs Master Guide

POLYROOT([coeff1,coeff2,…])
This function returns the roots of the polynomial whose coefficients are
specified. The coefficients must be input as a vector in square brackets.
()= (x − 2)(x + 3)(x −1) = x
3
− 7x + 6 we can enter the coefficients as
Eg. Using our earlier function of
fx
[1, 0, -7, 6].
As you can see in the screen shot, the roots of 2, -3 and 1 have been correctly found.
See page
309 for details on finding roots of real and complex polynomials using the CAS on the hp 40gs.
204

HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm