Getting Started with the TI-84 Plus C Silver Edition 25
Example: MX
2
, evaluates to a negative number (or 0). Use parentheses to
square a negative number.
Note: Use the ¹
key for subtraction and the Ì key for negation. If you
press ¹ to enter a negative number, as in
9 ¯ ¹ 7, or if you press Ì to
indicate subtraction, as in
9 Ì 7, an error occurs. If you press
ƒ
A Ì ƒ B, it is interpreted as implied multiplication (A…MB).
Entering Expressions and Instructions
What Is an Expression?
An expression is a group of numbers, variables, functions and their
arguments, or a combination of these elements. An expression evaluates
to a single answer. On the TI-84 Plus C, you enter an expression in the
same order as you
would write it on paper. For example, pR
2
is an
expression.
You can use an expression on the home scr
een
to calculate an answer. In
most places where a value is required, you can use an expression to enter
a value.
Entering an Expression
To create an expression, you enter numbers, variables, and functions
using the keyboard and menus. An expression is completed when you
press Í, regardless of the cursor location. The entire expression is
evaluated according to Equation Operating System (EOS™) rules, and the
answer is displayed according to the mode setting for
Answer.
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