Casio fx-9750G Equation Calculations - Manual (Page 7)

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• Each time you press w , the input value is registered in the highlighted cell. Each
press of w inputs values in the following sequence:
coefficient a
→
coefficient b
→
coefficient c
→
coefficient d
Input for coefficient d is required only for cubic equations.
• You can input fractions and value memory contents as coefficients.
After inputting the coefficients, press 1 (SOLV) to solve the equations.
1 (SOLV)
• Internal calculations are performed using a 15-digit mantissa, but results are dis-
played using a 10-digit mantissa and 2-digit exponent.
• An “Ma 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 Quadratic equations that produce multiple root (1 or 2)
solutions or imaginary number solutions
The following examples illustrate how multiple-root solutions and imaginary number
solutions are handled.
uuuuu
To solve a cubic equation that produces a multiple-value solution
Example To solve the following cubic equation:
x 3 – 4 x 2 + 5 x – 2 = 0
bw-ewfw-cw
1 (SOLV)
Quadratic and Cubic Equations
7 - 3
Highlighted solution cell value