Quadratic And Cubic Equations - Casio CFX-9850G PLUS Calculations 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.
104
ax bx
2
• Quadratic: +
ax bx
• Cubic: 3 +
• {2}/{3} ... {quadratic}/{cubic} equation
Example To solve the following cubic equation:
x x
3
– 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:
→ coefficient
a
coefficient
Input for coefficient
• You can input fractions and value memory contents as coefficients.
a
0):
G G G G G
c
+ = 0
cx d
2 + + = 0
x
2
– + 2 = 0
→ coefficient
b
d
is required only for cubic equations.
→ coefficient
c d
Highlighted solution cell value