Casio fx-9750G PLUS - Manual (Page 132)

104
7-3 Quadratic and Cubic Equations
This calculator can also solve quadratic and cubic equations that match the
following formats (when
a
G G G G G
0):
• Quadratic: ax 2 + bx + c = 0
• Cubic: ax 3 + bx 2 + cx + d = 0
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.
• { 2}/{3} ... {quadratic}/{cubic} equation
k k k k k
Solving a Quadratic or Cubic Equation
Example To solve the following cubic equation:
x 3 – 2 x 2 – x + 2 = 0
1. Press 2 (3) to enter the Cubic Equation Mode.
2. Input each coefficient.
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 b → coefficient c → coefficient d
Input for coefficient d is required only for cubic equations.
• You can input fractions and value memory contents as coefficients.
3. After inputting the coefficients, press 1 (SOLV) to solve the equations.
Highlighted solution cell value