Casio CLASSWIZ CG Software User's Manual page 115

Equation App
You can use the Equation app to solve simultaneous linear equations (two to six unknowns) and higher-order
equations (2 to 6 degrees). It also has a Solver function that solves an equation for any variable.
Solving Simultaneous Linear Equations
Example: To solve the following equations for x and y
1. h > Equation
2. On the Type tab, select [Simultaneous] and then press > or O.
3. On the Unknowns tab, select the number of unknowns and then press > or O.
• Here we have two unknowns, ( x and y ), so we choose [2 Unknowns].
4. On the Editor tab, input the coefficients of the equation.
5. To solve the equations, press > or O.
• This displays the solutions for x and y on the Result tab.
Details about the values in the cell at the current cursor
location are shown in the lower-right corner of the window.
* When S > [ π Result] is turned on, display is in and π form when possible (decimal form when not
possible).
When S > [ π Result] is turned off, display is in decimal form only.
Note
• The message "Infinitely Many Solutions" is displayed when there are infinite solutions.
• The calculator uses inverse matrix M
Because of this, accuracy may suffer as determinant Det( M ) of coefficient matrix M approaches 0.
Solving Higher-Order Equations
2
Example: To solve x + 2x − 2 = 0
1. h > Equation
2. On the Type tab, select [Polynomial] and then press > or O.
3. On the Degree tab, select the degree of the equation and then press > or O.
• Since we are solving a quadratic equation, we select [a
4. On the Editor tab, input the coefficients of the equation.
2x − y = 5
x ＋ 2y = 10
2Es-(M)1E5E
1E2E10E
*
-1
of coefficient matrix M to solve a linear system of equations.
2
X +a
2
115
X+a =0] here.
1 0