Texas Instruments TI-89 Manual Book page 14

Example — Roots of a Third-Degree Polynomial
Find the roots of 2x
1. Start
2. Press
3. Enter the coefficients: a
4. Press ‡ to solve the problem. The busy indicator on the
status line displays while the solution is calculated.
The values for x
= M.618034
x
1
x = 1.5
2
x = 1.61803
3
TI-89 / TI-92 Plus / Voyage™ 200 PLT Polynomial Root Finder App
N 5x
3
the Polynomial Root Finder App and select
¸ for a third-degree polynomial.
3
, x
1
2
+ x + 3 = 0.
= M
= , a
2
3 2
, and x are displayed:
2 3
New
, a = , a =
5 1
1 0
.
.
3
Page 14