HP 32SII Owner's Manual page 326

It's apparent from inspecting the equation that if x is a negative number, the
smallest that f(x) can be is 10. f(x) approaches 10 as x becomes a negative
number of large magnitude.
Example:
A Math Error.
Find the root of the equation:
Enter the equation as an expression:
Keys:
X
X
3
5
First attempt to find a positive root:
Keys:
0 X 10
X
Now attempt to find a negative root by entering guesses 0 and –10. Notice
that the function is undefined for values of x between 0 and –0.3 since those
values produce a positive denominator but a negative numerator, causing a
negative square root.
C–12 More about Solving
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24
÷ +
[x (x 0.3)]
Display:
Display:
_
Size : 17 .7 x 25.2 cm
− =
0 5 . 0
Description:
Selects Equation mode.
Enters the equation.
Checksum and length.
Cancels Equation mode.
Description:
Your positive guesses for the root.
Selects Equation mode; displays
the left end of the equation.
Calculates the root using guesses 0
and 10.