Negation - Texas Instruments TI-84 Plus Manual Book

You can omit the close parenthesis (
parenthetical elements are closed automatically at the end of an expression. This is also
true for open parenthetical elements that precede the store or display-conversion
instructions.
An open parenthesis following a list name, matrix name, or Y= function name does
Note:
not indicate implied multiplication. It specifies elements in the list (Chapter 11) or matrix
(Chapter 10) and specifies a value for which to solve the Y= function.

Negation

Negation
Negation Negation
To enter a negative number, use the negation key. Press Ì and then enter the number.
On the TI-84 Plus, negation is in the third level in the EOS hierarchy. Functions in the
first level, such as squaring, are evaluated before negation.
2
For example, M
, evaluates to a negative number (or 0). Use parentheses to square a
X
negative number.
Use the ¹ key for subtraction and the Ì key for negation. If you press ¹ to enter
Note:
a negative number, as in
an error occurs. If you press ƒ
...M
multiplication (
A
Chapter 1: Operating the TI-84 Plus Silver Edition
¯ ¹ , or if you press Ì to indicate subtraction, as in
9 7
).
B
) at the end of an expression. All open
)
Ì ƒ
, it is interpreted as implied
A B
Ì
,
9 7
42