122
uu
uu
uTo 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.
kk
kk
k Changing Coefficients
You can change a coefficient either before or after you register it by pressing w.
uu
uu
uTo change a coefficient before registering it with
ww
ww
w
Press the A key to clear the current value and then input another one.
uu
uu
uTo change a coefficient after registering it with
ww
ww
w
Use the cursor keys to highlight the cell that contains the coefficient that you want to
change. Next, input the value that you want to change to.
kk
kk
k Clearing All the Coefficients
While in the Quadratic or Cubic Equation Mode, press the 3 (CLR) function key.
This operation clears all the coefficients to zero.
3(CLR)
7 - 3 Quadratic and Cubic Equations
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