HP 33s - Manual (Page 333)

More about Solving D–9
f (x)
x
a
f (x)
x
b
f (x)
x
c
Case Where No Root Is Found
Example: A Relative Minimum.
Calculate the root of this parabolic equation:
x
2
– 6x + 13 = 0.
It has a minimum at x = 3.
Enter the equation as an expression:
Keys: Display: Description:
| H Selects Equation mode.
L X 2
6 z L X ›
13 ‘
%:. º%- Enters the equation.
| 
/
/
Checksum and length.