Question about Texas Instruments TI-83 Plus Calculator

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When I square a negative number (eg -2^2) it gives me a negative answer (-4) why isn't it giving me a positive answer?

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You're not squaring a negative number, you're negating a square. What you need to do is calculate (-2)^2 instead of the -(2^2) you're now calculating.

Posted on Feb 04, 2010

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I'm using a Casio fx-83GT PLUS Which I got for Christmas but recently I've noticed that when I do -2 to the power of 2 it gives me negative 4 rather than positive 4, is this a wrong s

The calculator is giving the correct result FOR THE PROBLEM YOU GAVE IT, not for the problem you meant to give it.

When you told it to calculate negative two to the second power, it calculates two to the second power, giving 4, then negates it, giving -4.

If you want to calculate the square of negative two, use parenthesis to tell the calculator that you want the negative to apply to the two and not to the result of the squaring.

Feb 02, 2015 | Casio Fx-83gtplus Scientific Calculator

1 Answer

When I square a negative number, my calculator gives me a negative number. i.e. -4^2=-16

No, you're not squaring a negative number, you're negating a square. When you press (-) 4 ^ 2 ENTER , the calculator is calculating -(4^2). 4^2 is 16, and the negative of that is -16. What you want to do is to calculate (-4)^2 by pressing ( (-) 4 ) ^ 2 ENTER .

Jul 11, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

When I punch (-2) to be squared I get a negative number instead of a positive number

You must enclose the negative number between parentheses. (-15)^2 will give 225 because it is the whole content of the parentheses that is squared. However if you write -15^2 the result is -225.Check the key stokes.

Jun 02, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

When i square a negative, i get a negative answer, how do i fix it so it gives me the positive number?

Actually, you're negating a square, not squaring a negative. When you put in -x^2, it's getting calculated as -(x^2). In order to square a negative number, use parentheses and calculate it as (-x)^2.

Also, make sure you're using the +- key to the right of th decimal point instead of the - key when entering the negative number.

Oct 01, 2010 | Texas Instruments TI-30X-IISTK Scientific...

1 Answer

Hi, i have a casio fx-82au plus, and it gives me the wrong answer when i press -X^2(X is any number. it'll give me -X. how can i fix this??

If you want to square a negative number, you should enclose it in parentheses then raise it to the 2nd power.
-5^2 =-25 .Priority to squaring ahead of negating
(-5)^2=25 .Priority to parentheses before squaring

Jan 28, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

I am tutoring a student who uses the Casio fx-300MS. A problem required that he raise (-2) to the 4th power, and the calculator indicated the answer was -16. I know that the answer should be a positive 16,...

Enclose any negative number between parentheses before squaring.
If you enter -4^2, where - is the negation, the result will be -16 because of the priority rules: exponentiation (power) has priority over negation.
If you enter (-4)^2 the result will be 16, because parentheses have priority over the squaring: the 4 is negated then the result is squared.

Dec 30, 2009 | Casio FX-300MS Calculator

1 Answer

Okay... my Ti-89 isn't squaring numbers right. I put in -2^2 and I get -4, or I put -3^2 and I get -9 and so forth. I thought and still believe that when you square any number, despite whether it's...

You are not using the right syntax. It has to do with priority of operations. raising a number to a power has priority over the negation sign (the change sign key). Th operations you are performing are treated as follows.
1. The square of 2 is calculated first (4),
2. then the negation (change sign) is performed, giving -4.

To get what you intend, namely the square of a negative number, you should enter the calculation as follows.
Since the parentheses have priority over everything else, the negation of 2 is calculated first, giving -2, then the power is performed next, and the result should be 4

If you need convincing, here is a screen capture.


Hope it helps.

Oct 26, 2009 | Texas Instruments TI-89 Calculator

2 Answers

How do you square a fraction with a negative number like (3/4)^-2

Place both the base and the exponent in parentheses

(3/4)^(-2) then press enter. Your answer will be in decimal form at first 1.777...

Press MATH
Select the 1: Fraction option and it will convert your decimal value to the fraction answer of 16/9.

Negative exponents flip the fraction. For instance, (3/4)^(-1) = 4/3. So for (3/4)^(-2) you could just square the numerator and denominator separately to get 9/16, and then flip the fraction to account for the negative. That will give you 16/9.

Jul 24, 2009 | Texas Instruments TI-83 Plus Calculator

2 Answers

How do you use the imaginary number with the TI-84 calculator?

If you want the answer in rectangular form, set MODE a+bi and tap ENTER and QUIT. Tap square root sign, tap (-)4 and close the parenthesis and tap ENTER. The answer is shown as 2i.
If you want the answer in polar form, set MODE to re^xi and and DEGREE. Tap ENTER and QUIT. Tap the square root sign, tap (-)4, close the parenthesis, and tap ENTER. The answer shown is 2e^90i. (2 at ninety degrees). If you selected RADIAN mode, the answer would be 2e^1.57i (2 at 1.57 radians; or 2 at pi/2 radians)

Mar 09, 2009 | Texas Instruments TI-86 Calculator

1 Answer

Wrong answer with squared negatives.

Your calculator will square a number before it applies the negative sign, so what you're actually doing is squaring 2, then applying the - sign to your answer. You need to put the -2 in parenthesis, so (-2)^2. That will give you 4. Hope this helps!

Nov 12, 2008 | Texas Instruments TI-83 Plus Calculator

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