HP 33s User Manual
Page 328
D–4
More about Solving
Keys:
Display:
Description:
| H
Select Equation mode.
2
^z
L
X
3
4
z
L
X
2
6
zL
X
8
.º%:-º%:. º
Enters the equation.
|
/
/
Checksum and length.
Cancels Equation mode.
Now, solve the equation to find the root:
Keys:
Display:
Description:
0
I
X 10
_
Initial guesses for the root.
| H
.º%:-º%:. º
Selects Equation mode;
displays the left end of the
equation.
X
#
%/
)
Solves for X; displays the
result.
)
Final two estimates are the
same to four decimal places.
.)
.
f(x)
is very small, so the
approximation is a good root.
Example:
An Equation with Two Roots.
Find the two roots of the parabolic equation:
x
2
+ x – 6 = 0.
Enter the equation as an expression:
Keys:
Display:
Description:
| H
Selects Equation mode.
L
X
2
L
X
6
%:-%.
Enters the equation.