Texas Instruments TI-89 Manual Book page 16

Example — Complex Coefficients
Find the roots of 15 x
1. Press 3 and set
Rectangular
2. Start
3. Press
4. Enter the coefficients: a
5. Press ‡ to solve the problem. The busy indicator on the
status line displays while the solution is calculated.
The values for x
= M.038274+.926765...
x
1
= M.174161N.282031...
x
2
x = .212435N.378067...
3
TI-89 / TI-92 Plus / Voyage™ 200 PLT Polynomial Root Finder App
N 4i x
3
.
the Polynomial Root Finder App and select
¸ for a third-degree polynomial.
3
, x
1
2
+ (7+i) x + 2i = 0.
to
Angle Radian
= , a
15
3 2
, and x are displayed:
2 3
i
i
i
and
Complex Format
= M
i, a = i, a
4 7+
1
to
.
New
=
i.
2
0
Page 16