Simultaneous linear equations
with two, three, or four
unknowns
Press
(Simul Equation), and then
use a number key (
to
) to
specify the number of unknowns.
Quadratic equations, cubic
equations, or quartic equations
Press
(Polynomial), and then use
a number key (
to
) to specify
the polynomial degree.
3. Use the Coefficient Editor that appears to input coefficient values.
• To solve 2
x
2
+
x
− 3 = 0, for example, press
(Polynomial)
in
step 2. Use the Coefficient Editor that appears to input
2
1
3
.
• Pressing
will clear all of the coefficients to zero.
4. After all the values are the way you want, press
.
• This will display a solution. Each press of
will display another
solution. Pressing
while the final solution is displayed will return to
the Coefficient Editor.
• A message appears to let you know when there is no solution or when
there are infinite solutions. Pressing
or
will return to the
Coefficient Editor.
• You can assign the currently displayed solution to a variable. While
the solution is displayed, press
and then the key that
corresponds to the name of the variable to which you want to assign
it.
• To return to the Coefficient Editor while any solution is displayed,
press
.
Note:
Solutions that include
√
are displayed only when the selected
calculation type is Polynomial.
To change the current equation type setting:
Press
(Simul
Equation) or
(Polynomial), and then press
,
, or
. Changing
the equation type causes the values of all Coefficient Editor coefficients to
change to zero.
Equation/Func Mode Calculation Examples
x
+ 2
y
= 3, 2
x
+ 3
y
= 4
(Simul Equation)
1
2
3
2
3
4
(x=)
(y=)
-1
2
x
2
+ 2
x
− 2 = 0
(Polynomial)
1
2
2
(x
1
=)
(x
2
=)
-1 + 3
-1 − 3
(Displays
x
-coordinate of local minimum of
y
=
x
2
+ 2
x
− 2.*)
(x=)
-1
(Displays
y
-coordinate of local minimum of
y
=
x
2
+ 2
x
− 2.*)
(y=)
-3
* The
x
- and
y
-coordinates of the local minimum (or local maximum) of the
function
y
=
ax
2
+
bx
+
c
are also displayed, but only when a quadratic
equation is selected for the calculation type.
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