Operation Manual

Chapter 1: Getting Started with the TI-84 Plus C Silver Edition 18
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 ¯¹7, or if you press Ì to indicate subtraction, as in 9 Ì 7, an error occurs. If you
press ƒ A ̃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 screen 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.
Most TI-84 Plus C functions and operations are symbols comprising several characters. You must enter
the symbol from the keyboard or a menu; do not spell it out. For example, to calculate the log of 45,
you must press «
45. Do not enter the letters L, O, and G. If you enter LOG, the TI-84 Plus C interprets
the entry as implied multiplication of the variables L, O, and G.
Note: In MathPrint™ mode, press ~ to get out of the MathPrint™ template and continue entering the
expression.
Calculate 3.76 P (L7.9 + ‡5) + 2 log 45.
MathPrint™ Classic
3 Ë 76 ¥ £ Ì 7 Ë 9 Ã
y C
5 ~ ¤ Ã 2 « 45 ¤
Í
3 Ë 76 ¥ £ Ì 7 Ë 9 Ã
y C
5 ¤ ¤ Ã 2 « 45 ¤
Í