Question about Texas Instruments TI-84 Plus Calculator

# How do you enter a plus minus sign?

Title says it all.

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• Anonymous Jan 25, 2009

How do you enter a plus minus sign?

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To put X+-X is to use the "(-)" button and not the "--" button for a negative.

Posted on Feb 09, 2009

• patrickrmurr Dec 16, 2010

This is not possible. You would have to enter and calculate the problem TWICE, once as a " ", and once as a "-", or you could use a PRGM which is programed to do the same.

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Posted on Jan 02, 2017

SOURCE: 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.

Posted on Aug 06, 2009

SOURCE: How do I enter the

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

Posted on Jun 22, 2009

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## Related Questions:

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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

### Everytime i try to graph a regullar function it says error

Hello
You might want to check if the function has been entered properly. It should be something like this: "Y1 = X^2 + 2X + 4".
One of the most common errors is the use of the minus ( - ) sign. If you use the minus sign that's at the bottom of the calculator you're setting a negative number, not making a substraction.
Good Luck!

May 03, 2011 | Texas Instruments TI-84 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 I ente 8x - 1 over 10 on my TI 84 plus silve edition

Hello,
I am not sure what the cross (x) means: is it a multiplication or the variable x, so I took a screen capture of both cases.

The top case is obtained as follows the asterisk is the multiplication sign to thr right of digit 9; the small minus is the change sign key the minus sign in parentheses under digit 3 and to the left of ENTER key.; the forward slash is the division sign, above the multiplication sign.
This small minus called change sign makes a positive number negative and a negative number positive, hence its name. If your expression starts with a negative sign that is the one to use. Use it also for negative exponents.

As you can see the result is -.8. Notice how the - before the dot is small with respect to the regular minus, as in the last expression.

For the last expression on the screen capture, there is nothing special, except that you have two ways to enter the variable X.

1. Press [ALPHA] [STO->]
2. Press the key [X,T, Theta, n] to the right of the green [ALPHA] key.

Hope it helps.

If x is the multiplication sign
8[x] [(] (-)1

Oct 06, 2009 | Texas Instruments TI-84 Plus Calculator

### How do you subtract on this calculator? if I do 10 minus it puts that minus in front of 10 and it can not subtract?

Its a little strange. Suppose you want subtract 10 from 38. Do this:
Enter 38 press plus key.
Enter 10, press minus key.
Press the equal sign. You will have the result.

Oct 05, 2009 | Canon P23-DH Calculator

### Using e on the BA II plus financial calculator

Hello,
To use the exponential function, you must enter the number then press [2nd][e to the x] or [e^x] for short.

e^(-0.1) is entered as (-)0.1 [2nd][e^x], where (-) is the change sign key
You will need to use extra parentheses to avoid errors.

20 - 18*( (-)0.1 [2nd][e^x] ) [=]
The Minus sign between 20 and 18 is the regular one. The (-) before the 0.1 is the change sign key (-) or sometimes labeled +/-. The asterisk is the multiplication sign.
Hope it helps.

Oct 03, 2009 | Texas Instruments BA-II 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

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