49
38
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