Casio CFX-9970G Manual - Halaman 6

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Casio CFX-9970G Manual

7-3 Quadratic and Cubic Equations

This calculator can also solve quadratic and cubic equations that match the
following formats (when
k k k k k Specifying the Degree of an Equation
While in the Equation Mode, press 2 (POLY) and then specify the degree of the
equation.
k k k k k Solving a Quadratic or Cubic Equation
1. Press 2 (3) to enter the Cubic Equation Mode.
2. Input each coefficient.
3. After inputting the coefficients, press 1 (SOLV) to solve the equations.
2
ax
bx
• Quadratic:
+
ax
bx
• Cubic:
3
+
• {2}/{3} ... {quadratic}/{cubic} equation
Example
To solve the following cubic equation:
x
3
x
– 2
bw-cw-bwcw
• Each time you press w, the input value is registered in the highlighted cell.
Each press of w inputs values in the following sequence:
a
coefficient
coefficient
Input for coefficient
• You can input fractions and value memory contents as coefficients.
a
G G G G G
0):
c
+
= 0
cx
d
2
+
+
= 0
2
x
–
+ 2 = 0
b
coefficient
d
is required only for cubic equations.
c
d
coefficient
Highlighted solution cell value
104