HP 35s User Manual page 3

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HP 35s Solving for roots
If the checksum of the program just entered does not equal 8B27, 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 has a negative root as well, store a new guess for X of -10 into the variable X.
There is no need to set the function to X (since it has already been done). Solve for the value of X.
In RPN or algebraic mode: 10zºeXºÛX
Answer: Roots found for the equation are –2 and +2.
Example 2: Solve for the roots of Y = X
Solution: We're looking for values of X such that X
value of the function. If a program already exists in program memory with the name of X, then it will need to
be cleared. This can be done by pressing ¹uÕÏ to have the HP 35s display the list of
programs in the calculator and then press Ø to step through the program labels. When the label of the
program to be deleted is shown in the display, pressing º¡will delete that program from the
calculator's memory. Pressing Å will then clear the display and allow you to proceed.
In RPN or algebraic mode: º£ºÓXd
To show the checksum and length of this program, press the following in RPN or algebraic mode. Note that
the symbol Õ means to press the right arrow direction cursor key.
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– 7X + 12
2
– 7X + 12 = 0. First, we'll enter a program that computes the
2
hX)2Ã7¸hXÙ12Ï
¹Ô
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Figure 3
Figure 4
Figure 5
HP 35s Solving for roots - Version 1.0