Texas Instruments Titanium TI-89 User Manual

Activities 744
Detailed information about using the functions in this example can be found in Symbolic
Manipulation.
Performing Computations to Derive the Quadratic Formula
Performing Computations to Derive the Quadratic FormulaPerforming Computations to Derive the Quadratic Formula
Performing Computations to Derive the Quadratic Formula
Perform the following steps to derive the quadratic formula by completing the square of
the generalized quadratic equation.
1. Clear all one-character variables in the
current folder.
2 ˆ
Choose
1:Clear a-z and press ¸ to
confirm.
2. On the Home screen, enter the
generalized quadratic equation:
ax
2
+bx+c=0.
3. Subtract c from both sides of the
equation.
2 ± | j
C
Note:
This example uses the result of the
last answer to perform computations on
the TI-89 Titanium. This feature reduces
keystroking and chances for error.

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)