When the display characters are dim or show the follow
message on the screen, turn the calculator off and replace the
lithium battery immediately.
Please replace the lithium battery using the following procedures,
1. Press to power off the calculator.
2. Remove the screw that securely fixes the battery cover in place.
3. Remove battery cover.
4. Remove the old battery with ball pen or similar sharp object.
5. Load the new battery with positive
"
+
"
side facing up.
6. Replace the battery cover, screw, and press ,
to initialize the calculator.
BATTERY REPLACEMENT
38
Quadratic and Cubic Equations
Quadratic equation : ax
2
+ bx + c = 0 (a second-order
polynomial equation with a single variable x)
Cubic equation
: ax
3
+ bx
2
+ cx + d = 0 (an equation with
cubic polynomial)
Example:
Solve the Cubic equation 5x
3
+ 2x
2
– 2x + 1 = 0
For quadratic, cubic, or quartic equations, the variable name
starts with
"
X
1
"
.
(Cubic equation)
X
1
=
X
2
=
X
3
=
Display
Key in operation
+0.331662479
i
3
10
–0.331662479
i
3
10
–
1
LOW BATTERY
Shift
Shift
