Quadratic And Cubic Equations - Casio FX-9750G PLUS User's Manual & Technical Reference

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
• Quadratic: +
2
ax bx
• Cubic: +
3
• {2}/{3} ... {quadratic}/{cubic} equation
Example To solve the following cubic equation:
x x
– 2
3
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
0):
G G G G G
c
+ = 0
cx d
+ + = 0
2
x
– + 2 = 0
2
b → coefficient
d
is required only for cubic equations.
c → coefficient d
Highlighted solution cell value