HP 35s Scientific Calculator - Manual (Page 108)

6-6 Entering and Evaluating Equations
Parentheses in Equations
You can include parentheses in equations to control the order in which operations
are performed. Press
4
to insert parentheses. (For more information, see
"Operator Precedence" later in this chapter.)
Example: Entering an Equation.
Enter the equation r = 2 × c ×(t – a)+25
Displaying and Selecting Equations
The equation list contains two built-in equations, 2*2 lin. solve and 3*3 lin. Solve,
and the equations you've entered. You can display the equations and select one to
work with.
Keys: Display: Description:

 π Shows the last equation used in
the equation list.

_ Starts a new equation with
variable R.

 _ Enters a number

_ Enters infix operators.
4

Enters a prefix function with a left
parenthesis.

Õ
  _
Enters the argument and right
parenthesis.


Terminates the equation and
displays it.
  
 Shows its checksum and length.
 Leaves Equation mode.