Canon F-789SGA Calculator User Manual


 
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Solve Function
You can solve custom calculation expressions in COMP mode.
Simply input the expression with different variables and press the
key.
Solves for X, for example, when an equation is input as:
X = Y + 5, X
Solves for Y, for example, when an equation is input as:
Y = X + 5, Y
Example: A cone with height "h' and a circular base with radius "r";
find the cone volume using this formula:
Replace the variable "V" with X, variable "r"
with "B", and variable "h" with "C".
Quadratic, Cubic and Quart Equations
Quadratic equation : ax
2
+ bx + c = 0 (a second-order polynomial
equation with a single variable x)
Cubic equation : ax
3
+ bx
2
+ cx + d = 0 (an equation with cubic
polynomial)
Quart equation : ax
4
+ bx
3
+ cx
2
+ dx + e = 0
h
s
r
For quadratic, cubic or quart equations, the variable name starts
with “X
1”.
Example: Solve the Cubic equation 5x
3
+ 2x
2
– 2x + 1 = 0
(Cubic equation)
X
1
=
X
2
=
X
3
=
DisplayKey in operation
3
10
+0.331662479
3
10
-0.331662479
-1
X