HP 35s Scientific Calculator - Manual (Page 327)

More about Solving D-5
Now, solve the equation to find its positive and negative roots:
Certain cases require special consideration:
If the function's graph has a discontinuity that crosses the x–axis, then the
SOLVE operation returns a value adjacent to the discontinuity (see figure a,
below). In this case, f(x) may be relatively large.
Keys: Display: Description:
 Selects Equation mode.
X
X


Enters the equation.
 
 Checksum and length.

Cancels Equation mode.
Keys: Display: Description:
X

_
Your initial guesses for the positive
root.
  Selects Equation mode; displays
the equation.
X 


Calculates the positive root using
guesses 0 and 10.
 
Final two estimates are the same.
  
f(x) = 0.
X

_
Your initial guesses for the
negative root.
 
Redisplays the equation.
X 

 Calculates negative root using
guesses 0 and –10.
    f(x) = 0.