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Casio fx-9750G PLUS User Manual

Page 133

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105

• Internal calculations are performed using a 15-digit mantissa, but results are

displayed using a 10-digit mantissa and 2-digit exponent.

• An error occurs whenever the unit is unable to solve the equations.
• Pressing 1 (REPT) returns to the initial display of the Cubic Equation Mode.

k

k

k

k

k

Multiple root (1 or 2) solutions or imaginary number

solutions

The following examples illustrate how multiple-root solutions and imaginary
number solutions are handled.

u

u

u

u

u

To solve a cubic equation that produces a multiple-value solution

Example

To solve the following cubic equation:

x

3

– 4

x

2

+

5x

– 2 = 0

bw-ewfw-cw

1

(SOLV)

u

u

u

u

u

To solve a cubic equation that produces an imaginary number

solution

Example

To solve the following cubic equation:

x

3

+

x

2

+

x

– 3 = 0

bwbwbw-dw

1

(SOLV)

It may take considerable time for the calculation result of cubic equations to
appear on the display. Failure of a result to appear immediately does not
mean that the unit is not functioning properly.

Quadratic and Cubic Equations

7 - 3

This manual is related to the following products:
See also other documents in the category Casio Calculators, organizers: