Texas Instruments TI-84 Plus Guide Book

Chapter 17: Activities 460
Chapter 17:
Chapter 17: Chapter 17:
Chapter 17:
Activities
ActivitiesActivities
Activities
The Quadratic Formula
The Quadratic FormulaThe Quadratic Formula
The Quadratic Formula
Entering a Calculation
Entering a CalculationEntering a Calculation
Entering a Calculation
Use the quadratic formula to solve the quadratic equations 3x
2
+ 5x + 2 = 0 and
2x
2
N x + 3 = 0. Begin with the equation 3x
2
+5x+2=0.
1. Press
3 ¿ ƒ [A] (above ) to
store the coefficient of the x
2
term.
2. Press ƒ [:] (above Ë). The colon
allows you to enter more than one
instruction on a line.
3. Press
5 ¿ ƒ [B] (above Œ) to
store the coefficient of the X term. Press
ƒ [:] to enter a new instruction on
the same line. Press
2 ¿ ƒ [C]
(above ) to store the constant.
4. Press Í to store the values to the
variables A, B, and C.
The last value you stored is shown on
the right side of the display. The cursor
moves to the next line, ready for your
next entry.

Texas Instruments TI-84 Plus Specifications

General

Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
Digits	- digits
Display number of lines	8 lines
Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-