Question about Texas Instruments TI-83 Plus Silver Edition Calculator

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TI-83 Plus No Longer Squares Correctly

My calculator squares negative numbers incorrectly. When I enter "-2" and square it, the calcular answers "-4." Is there any way to fix this without having to reset my calculator?

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When you type -2 imagine your calculator doing the equation: -1 x 2. The - sign actually stands for a -1 so when you do -2 squared your calculator is simply following order of operations. It first squares the 2 making it 4, then it multiplies the negative making it -4. In order to get around this you must use parenthese. (-2)^2.

Hope this helped

Posted on Nov 23, 2008

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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

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How do you do you put square roots into its simplest radical form? Because I can do small numbers mentally but when they are bigger I get stuck..


well,

I really don't like to tell this to you but the Ti-84 plus will not display a square root as an answer, it will always return answers in decimal form. The best way for you to simplify roots is by using a factor tree and knowing your squares up to 30. I went through all of that using a ti-83 plus so I completely understand your desire for it to show a root, it just won't. I really wish you the best with this problem, but having read the owners manual for it, I just don't see any other way to do it.

Mar 21, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

Why is it that when I put in negative numbers squared, the answer comes out negative? EX: -105 ^ 2 = -11025 The above is what my calculator states (which is clearly wrong because it shouldn't be...


If you're pressing the keys
(-) 1 0 5 ^ 2 ENTER
then you're not squaring a negative number, you're negating a square. This sequence of keystrokes calculates -(105^2), and -11025 is the correct answer for this.

Since the ^ operator binds more tightly than the (-) operator, you need to tell the calculator you want to override the order of operations, just as you would if you wanted an addition done before a multiplication. Press
( (-) 1 0 5 ) ^ 2 ENTER and you will see the expected result.

Jan 23, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

The square root of -(49/64)


The square root of a negative number does not exist in lR, the set of real numbers.
In the set of Complex numbers the square root of -49/64 is (7/8)i, where i is the imaginary unit defined by i^2=-1.

Nov 23, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

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?


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.

Feb 04, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

I ask my TI-83 Plus to calculate (-64)^(3/2) The TI-83 Plus says the answer is -512i, but I think the answer should be 512i. Is the calculator wrong or am I?


You're both right, in a way. (-64)^3 is -262144. The square root of that is +/- 512i. Take your choice as to the sign.

For what it's worth, the TI-84, TI-86, TI-89, and the HP 50g all go with the negative value.

Jan 24, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

-2^2 = -4 ?????


This is correct. The negative of two-squared is -4.

Exponentiation binds more tightly than negation. If you want (negative 2) squared, you have to express it that way:

( [-] 2 ) ^ 2

Jan 18, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

When I enter -5^2 I keep getting -25. Same for when I enter -5 and push the squared button. What is wrong?


Hello,
What you are calculating is -1 times 5^2 which is -1*25=-25.
If you want to calculate the square of -5 you enclose it between parentheses.

Reason

There are two operations: the power and the negation and the power has priority. Thus 5^2 is calculated first, then its negative is taken.
If you put it inside parentheses, the () has priority. The negative of 5 is taken first, then the result is squared giving 25.

(-5)^2=25.
Hope it helps.

Oct 21, 2009 | Texas Instruments TI-83 Plus 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

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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