Casio SERIES FX-9860G - Manual (Page 171)

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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)
3 bw-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