Casio fx-991ZA PLUS II User Manual

• Pressing will clear all of the coefficients to zero.
Note: The following operations are not supported by the Coef
ficient
Editor:
, (M-), (STO). Pol, Rec, ÷R, and multi-
statements also cannot be input with the Coef
ficient Editor.
5. After all the values are the way you want, press
.
• This will display the solutions.
• To return to the Coefficient Editor while the solutions are displayed,
press .
Note
• Values cannot be converted to engineering notation on the solution screen.
Changing the Inequality T
ype
Press
(INEQ) and then select an inequality type from the menu
that appears. Changing the inequality type causes the values of all
Coef
ficient Editor coefficients to change to zero.
INEQ Mode Calculation Examples
Example 1: x
2
+ 2x - 3 < 0 (MthIO-MathO)
(INEQ) (aX
2
+ bX + c)
(aX
2
+ bX + c < 0)
1 2 3
Example 2: x
2
+ 2x
- 3 ≧ 0 (MthIO-MathO)
(INEQ) (aX
2
+ bX + c)
(aX
2
+ bX + c ≧ 0)
1 2 3
79

Casio fx-991ZA PLUS II Specifications

General

Type	Scientific Calculator
Number of Functions	552
Equation Solver	Yes
Matrix Calculations	Yes
Complex Number Calculations	Yes
Integration	Yes
Differentiation	Yes
Memory	9 variables
Weight	95 g
Protective Case	Yes
Display	Natural Textbook Display
Power Source	Solar and Battery