Equation Calculations (Eqn) (Fx-95Es Plus Only) - Casio fx-82ES PLUS User Manual

Important!
• Regression coefficient, correlation coefficient, and estimated value calculations can
take considerable time when there are a large number of data items.
Equation Calculations (EQN)
(fx-95ES PLUS only)
You can use the following procedure in the EQN Mode to solve
simultaneous linear equations with two or three unknowns, quadratic
equations, and cubic equations.
1. Press (EQN) to enter the EQN Mode.
2. On the menu that appears, select an equation type.
To select this
calculation type:
Simultaneous linear
equations with two
unknowns
Simultaneous linear
equations with three
unknowns
Quadratic equation
Cubic equation
3. Use the Coefficient Editor that appears to input coefficient values.
2
• To solve 2x + x - 3 = 0, for example, press
input the following for the coefficients (a = 2, b = 1, c = -3): 2
3 .
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press
• Pressing will clear all of the coefficients to zero.
Press this key:
(a X + b Y = c )
n n n
(a X + b Y + c Z = d
n n n
2
(aX + bX + c = 0)
3 2
(aX + bX + cX + d = 0)
in step 2, and then
44
)
n
1
.