Casio CFX-9800G - Page 91

Clearing Ali the Coefficients __ ey oc eee Be
While in the Linear Equation Mode, press the [F2) (CLR) Ren key. This operation clears
all the coefficients to zero. oa ok ie a tongs
&)(CLR)
7-3 Quadratic: and Cubic Equations
This calculator can also solve quadratic and cubic equations that match the following for-
mats (when a0):
*Quadratic: ax? +bx+¢=0 ot ay
¢Cubic: axs + bx?+ex+d=0
mEntering the Quadratic/Cubic Equation Modes. 2h:
. While the \e Equation Mode. is alspiayes. press PLY). tlstet sae gd
PLY» ws : en t Hay :
a ot «No date..,
in memory.
Degree?
EvEF
“The following are the operations that are available from the function menu-at the bottom
of the:display. Press the furiction’key below the operation aa want to° petform:
FI(2)
.
Quadratic:
equation
i
F2}(3)... Gubic equation:
mSolving a Quadratic or Cubic Equation
Example To solve the following cubic equation:
2x? +25 0. _ buahthg
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While ‘in the Quadratic or Cubic Equation Mode (PLY); press (3) to enter the Cubic
Equation Mode. ca
(3)
Cell for input of coefficients
-: Value: being input into highlighted celt
Input each coefficient.
ee ((2)G¢)
Hes (2)e9
Each time you press G3, the input value is registered in the highlighted cell. Each press
of @ inputs values in the following sequence:
coefficient a + coefficient b >coefficient c coefficient d
Input for coefficient d is required only input for cubic equations.
*You.can input fractions and:value memory contents as coefficients.
After-inputting the .coefficients;. press [F): (SOL). to solve the: equations.
Fi}(SOL)
Highlited solution cell value-
*Internal calculations are performed using a 15-digit mantissa, but results are displayed
using a 10-digit mantissa and 2-digit exponent.
*An “Ma ERROR” occurs whenever the unit is unable to solve the equations.
*Pressing (i (RPT) returns to the initial display of the Quadratic Equation Mode.
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