Casio fx-CG20 Manual De Usuario
CASIO
4-4
Complex Number Solution (Example:
x
3
+ 2
x
2
+ 3
x
+ 2 = 0)
Complex Mode: Real (page 1-33)
Complex Mode:
a
+
b i
Complex Mode:
r
∠
θ
• Internal calculations are performed using a 15-digit mantissa, but results are displayed
using a 10-digit mantissa and a 2-digit exponent.
• It may take considerable time for the calculation result of a high-order equation of 3rd degree
or higher to appear on the display.
• An error occurs if the calculator is unable to find a solution.
• High-order equation calculations may not produce accurate results when the equation has
multiple
solutions.
• After calculation is complete, you can press
1(REPEAT), change coefficient values, and
then
re-calculate.
3. Solve Calculations
The Solve calculation mode lets you determine the value of any variable in a formula without
having to solve the equation.
Important!
• You can input either an upper-case X (
a+(X)) or lower-case
x
(
v) for variable X.
Both “X” and “
x
” refer to the same variable.
1. From the Main Menu, enter the Equation mode.
2. Select the SOLVER mode, and input the equation as it is written.
• If you do not input an equals sign, the calculator assumes that the expression is to the left
of the equals sign, and there is a zero to the right.
• An error occurs if you input more than one equals sign.