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121
• 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.
kk
kk
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.
uu
uu
uTo solve a cubic equation that produces a multiple-value solution
Example To solve the following cubic equation:
x
3
– 4x
2
+ 5x – 2 = 0
bw-ewfw-cw
1(SOLV)
Quadratic and Cubic Equations 7 - 3
Highlighted solution cell value
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