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E-55
Equation Calculations (EQN)
All calculations in this section are performed in the EQN Mode
(N5).
k Equation Types
An equation type menu appears when you press N5(EQN) and
enter the EQN Mode.
Key Menu Item Equation Type
Simultaneous Linear
1 a
n
X + b
n
Y = c
n
Equations with Two
Unknowns
Simultaneous Linear
2 a
n
X + b
n
Y + c
n
Z = d
n
Equations with Three
Unknowns
3 aX
2
+ bX + c = 0 Quadratic Equation
4 aX
3
+ bX
2
+ cX + d = 0 Cubic Equation
Changing the Current Equation Type Setting
Press N5(EQN) to re-enter the EQN Mode. This clears all current
EQN Mode input and displays the equation type menu described
above.
k Inputting Coefficients
Use the coefficient editor screen to input the coefficients of an
equation. The coefficient editor screen shows input cells for each of
the coefficients required by the currently selected equation type.
Simultaneous linear Cubic equation
equations with two unknowns
Rules for Inputting and Editing Coefficients
•Data you input is inserted into the cell where the cursor is located.
When you register input into a cell, the cursor moves to the next
cell to the right.
•When simultaneous linear equations with three unknowns or cubic
equation is selected as the equation type, the d column will not be
visible on the display when the coefficient editor screen is first
displayed. The d column will become visible when you move the
cursor to it, which causes the screen to shift.
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