HP 35s User Manual page 4

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HP 35s Solving for roots
In RPN or algebraic mode: ¹uÕϹÎ
If the checksum of the program just entered does not equal 1086, then you have not entered it correctly.
To clear the checksum display press:
In RPN or algebraic mode: º£
Then, to exit the program environment, press:
In RPN or algebraic mode: º£
Store an initial guess for X of 10 into the variable X. Then set the function to X and solve for the value of X.
In RPN or algebraic mode: 10ºeX¹sXºÛX
Since you feel this equation might have a root larger than this, store a new guess for X of 100 into the
variable X. There is no need to set the function to X (since it has already been done). Then solve for the
value of X.
In RPN or algebraic mode: 100ºeXºÛX
The same root is returned. This is a good indication (but certainly not foolproof) that there are no roots
larger than +4 for this equation.
To see if there is a root less than +4 for this equation, store a new guess for X of –10 into the variable X.
Then solve for the value of X.
hp calculators - 4 -
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Figure 8
HP 35s Solving for roots - Version 1.0