Casio fx-9860G Series

20070201
4-2-2
Quadratic and Cubic Equations
Example To solve the cubic equation (Angle unit = Rad)
x
3
– 2 x
2
– x + 2 = 0
Procedure
1 m EQUA
2 2(POLY)
2(3)
3bw-cw-bwcw
4 1(SOLV)
Result Screen
Multiple Solutions (Example: x
3
+ 3 x
2
+ 3 x + 1 = 0)
Complex Number Solution (Example:
x
3
+ 2 x
2
+ 3 x + 2 = 0)
Complex Mode: Real (page 1-8-2)
Complex Mode: a + bi
Complex Mode:
r ∠ θ