Casio FX-9860G SD - Page 167

20050401
4-2-2
Quadratic and Cubic Equations
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Example To solve the cubic equation (Angle unit = Rad)
x
3
– 2x
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
+ 3x
2
+ 3x + 1 = 0)
Complex Number Solution (Example: x
3
+ 2x
2
+ 3x + 2 = 0)
Complex Mode: Real (page 1-7-2)
Complex Mode: a + bi
Complex Mode: r∠ θ