Casio fx-991EX User Manual

fx-991EX Quick Start Guide 45
Solving polynomial inequalities has never been easier.
From the Main Menu, use the arrow keys to highlight the
Inequality icon and press por press x(B).
Enter the degree of the polynomial inequality, in this case,
3(Degree).
Choose the form of the inequality. Press 2
( ).
Enter the coefcients of the polynomial, as shown.
Press 1p4p1pz6p.
Press p to see the solutions.
Notice, the form of the inequality is written
as x < a, b < x < c.
If the solution runs off the screen, use the left and right (!$)
arrow keys to see the entire solution.
INEQUALITY

Casio fx-991EX Specifications

General

Type	Scientific
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black, White
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Digits	16 digits
Display type	LCD
Display resolution	192 x 63 pixels
Display number of lines	2 lines
Display number of characters	16
Storage media type	-
Operation	552
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	165.5 mm
Width	77 mm
Height	11.1 mm
Weight	90 g