Solution 29230: Squaring Negative Numbers on Texas Instruments Graphing Calculators and Software.
How do I square a negative number on my graphing calculator and software?These calculators use an Equation Operating System (EOS™), which evaluates from left to right, allowing the user to enter numbers and functions in a straightforward sequence. Parentheses are necessary to define the order of operations within an expression. For example, the calculator reads the expression -32 as (-1) x 32, and evaluates accordingly. The parentheses will assign the negative symbol to the value to be squared.
Please follow these steps for squaring negative numbers using the example of -32:
• Press [(] to open parenthesis.
• Press the [(-)]  [)].
• Press [x2] or [^] .
• Press [ENTER].
Please see the graphing calculator guidebooks for additional information.