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# How do I enter the ''plus or minus'' sign into my TI-89 calculator?

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Www.cohs.com/.../49_Tips%20for%20Math%20with%20the%20TI-89%20Titanium.doc

Posted on Jun 22, 2009

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Posted on Jan 02, 2017

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## Related Questions:

### Argument error ti nspire

What are you trying to do?
Could it be that you entered a + sign followed by a - (minus) sign instead of a change sign (-). +-10

May 21, 2013 | Texas Instruments TI-83 Plus Calculator

### How do you enter the "plus or minus" sign into the y= of a ti-84

The calculator cannot handle "plus or minus" in the same equation. If you need both, enter two equations into y=, one for plus and the other for minus.

Feb 25, 2011 | Texas Instruments TI-84 Plus Calculator

### I also have Err: Syntax when i try to graph and i think thats because i use the regular MINUS but how do i use this '(-)' minus??

Simply press the (-) key before entering a negative number, in the same place you see the negative sign in print.

For example, to multiply 3 by -4, press 3 x (-) 4 ENTER

Nov 08, 2010 | Texas Instruments TI-83 Plus Calculator

### Err:syntax when I try to graph with ''-'' on ti-84 plus

Hello,
The calculator has two minus signs
1. The regular MINUS sign which is used with the subtraction operation. This operation is binary, requiring two operands (two terms). In a-b, a and be are the operands (they very specific names, but I will skip this detail).
2. The negation or change sign. This operation is called unary, requiring one operand. -a means take the negative of the number a.
These are the technicalities, in which you may not be interested. On calculators, the two operations are implemented differently, with two signs, the regular minus sign -- , and the change sign (-) usually smaller in size than the regular -- sign and raised above the main line.

Examples. Let (-) be the negation and -- the regular minus.
• If you enter (-) 12 the TI84Plus accepts it and calculates the negative of 12.
• If you enter 12 (-) 13 the TI protests with a syntax error
• If you enter 12 ( (-) 13) the calculator interprets it as 12* (-13) and calculates -156.
• If you enter --12, the calculator displays Ans--12, where Ans is the last result calculated. If Ans happens to be 0, the new result is obviously the one you are expecting. But if Ans holds a non zero value, this is incorrect.
Suppose you have to calculate X^(-2)*X^(-1/3)
You can enter it exactly as it is written above. In this case, you must use the change sign (-) in both factors.
You can also decide to use the power rules and enter the expression as X^( -2 --1/3). In this case the first minus is the negation and the second is the regular minus.

I could go on with a few more examples, but that will take us away from your present concern.

In short.
1. If the minus sign is the leftmost (first) symbol in your function (after the Y1=) you should use the negation. Any subsequent minus should be the regular minus --
2. If the minus sign is the first symbol in an exponent, you must use the negation. Any subsequent minus in the expression of an exponent should be the regular minus --
I hope it did not bore you death with details you do not care to know about. I do hope that it will help you prevent this type of syntax errors.

Do not forget to rate the solution

Dec 13, 2009 | Texas Instruments TI-84 Plus Silver...

### How do you use a plus or minus sign on a TI-84

Hi,
You cannot use the ± in the definition of a function. If you need to consider two alternatives, you have draw each function separately, one function as Y1 and the other as Y2. I just checked the catalog of commands, and there is no ±.

Hope it helps.
Thanks for using FixYa

Nov 19, 2009 | Texas Instruments TI-84 Plus Calculator

### Plus or Minus Sign

I'm assuming you want the +/- symbol like you see in the quadratic formula. There is no key to enter this. You will have to enter 2 separate problems. Enter the numbers with the + symbol and then enter the numbers with the - symbol.

Jun 05, 2009 | Texas Instruments TI-84 Plus Calculator

### TI 89 calculator

have you tried adjusting the contrast from plus and minus buttons?

Feb 27, 2008 | Texas Instruments TI-89 Calculator

### Ti-83 plus

try changing the back up battery also. This generally helps. The next time you change your batteries, change them one at a time. don't take them all out at once. This won't happen if you do it like that.

Jan 19, 2008 | Texas Instruments TI-83 Plus Silver...

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