Texas Instruments TI-82 STATS User Manual

8 Getting Started
82STAT~1.DOC TI-83 international English Bob Fedorisko Revised: 10/27/05 1:33 PM Printed: 10/27/05 3:30
PM Page 8 of 18
Now solve the equation 2X
2
N X + 3 = 0. When you set a+bi complex number mode,
the TI-82 STATS displays complex results.
1. Press z † † † † † † (6 times), and
then press ~ to position the cursor over
a+b
i
.
Press Í to select
a+b
i
complex-numbe
r
mode.
2. Press y [QUIT] (above z) to return to the
home screen, and then press ‘ to clear it.
3. Press 2 ¿ ƒ [A] ƒ [ : ] Ì 1
¿ ƒ [B] ƒ [ : ] 3 ¿ ƒ
[
C] Í.
The coefficient of the X
2
term, the coefficient
of the X term, and the constant for the new
equation are stored to A, B, and C,
respectively.
4. Press y [ENTRY] to recall the store
instruction, and then press y [
ENTRY] again
to recall the quadratic-formula expression,
−
−−bb ac
a
2
4
2
5. Press Í to find one solution for the
equation 2X
2
N X + 3 = 0.
6. Press y [ENTRY] repeatedly until this
quadratic-formula expression is displayed:
−
+−bb ac
a
2
4
2
7. Press Í to find the other solution for the
quadratic equation: 2X
2
N X + 3 = 0.
Note: An alternative for solving equations for real numbers is to use the built-in Equation
Solver (Chapter 2).
Displaying Complex Results: The Quadratic Formula

Texas Instruments TI-82 STATS Specifications

General

Brand	Texas Instruments
Model	TI-82 STATS
Category	Calculator
Language	English