Casio FX-9750G - Quadratic and Cubic Equations; Entering the Quadratic;Cubic Equation Mode; Solving a Quadratic or Cubic Equation

120
7-3 Quadratic and Cubic Equations
This calculator can also solve quadratic and cubic equations that match the following
formats (when a
GG
GG
G 0):
• Quadratic: ax
2
+ bx + c = 0
• Cubic:
ax
3
+ bx
2
+ cx + d = 0
kk
kk
k Entering the Quadratic/Cubic Equation Mode
While in the Equation Mode, press 2 (POLY).
2(POLY)
1(2) ............. Quadratic equation
2(3) ............. Cubic equation
kk
kk
k Solving a Quadratic or Cubic Equation
Example To solve the following cubic equation:
x
3
– 2x
2
– x + 2 = 0
Press 2 (3) to enter the Cubic Equation Mode.
2(3)
Input each coefficient.
bw-cw
-bwcw
123456
1 23456
Value being input into highlighted cell
Cell for input of coefficients