HP 35s Scientific Calculator - Manual (Page 331)

More about Solving D-9
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:

Selects Equation mode.
X
X


Enters the equation.
f (x)
x
a
f (x)
x
b
f (x)
x
c
Case Where No Root Is Found