Texas Instruments TI-83 Manual Book page 49

Implied
Multiplication
Parentheses
Negation
The TI.83 recognizes implied multiplication, so you need
not press ¯ to express multiplication in all cases. For
example, the TI.83 interprets
as implied multiplication.
Note: TI.83 implied multiplication rules differ from those of the TI.82.
For example, the TI.83 evaluates
1à2X 1/(2äX)
evaluates as
All calculations inside a pair of parentheses are completed
first. For example, in the expression
evaluates the portion inside the parentheses,
multiplies the answer,
You can omit the close parenthesis (
expression. All open 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.
Note: An open parenthesis following a list name, matrix name, or
function name does 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
To enter a negative number, use the negation key. Press Ì
and then enter the number. On the TI.83, 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, MX
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
press Ì to indicate subtraction, as in
press ƒ Ì ƒ
A
AäMB
( ).
,
2p 4sin(46)
1à2X
(Chapter 2).
, by .
3 4
Y=
function.
, evaluates to a negative number (or 0).
9 Ì
B
, it is interpreted as implied multiplication
Operating the TI-83 1-23
, , and
5(1+2)
(1à2)äX
as , while the TI.82
, EOS first
4(1+2)
, and then
1+2
) at the end of an
)
9 ¯ ¹ 7
, or if you
7
, an error occurs. If you
(2ä5)7
Y=