Texas Instruments TI-82 User Manual - Page 45
before negation. - calculator instructions
UPC - 033317086337
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Implied Multiplication The TI.82 recognizes implied multiplication. For example, it understands 2p, 4 sin 46, 5(1+2), and (2...5)7 as implied multiplication. Parentheses All calculations inside a pair of parentheses are completed first. For example, in the expression 4(1+2), EOS first evaluates the portion inside the parentheses, 1+2, and then multiplies the answer, 3, by 4. You can omit any right (close) parenthesis at the end of an expression. All "open" parenthetical elements are closed automatically at the end of an expression and preceding the ! (store) or display conversion instructions. Note: If the name of a list or matrix is followed by an open parenthesis, it does not indicate implied multiplication. It is used to access specific elements in the list (Chapter 11) or matrix (Chapter 10). Negation To enter a negative number, use the negation function. Press Ì and then enter the number. On the TI.82, negation is in the fourth group in the EOS hierarchy. Functions in the first group, such as squaring, are evaluated before negation. For example, MX2 is a negative number (or 0); M92 is M81. Use parentheses to square a negative number: (M9)2. 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, it is an error. If you press ƒ A Ì ƒ B, it is interpreted as implied multiplication (A...MB). Operating the TI.82 1-21