why plus or minus square root ?

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https://www.geeksforgeeks.org › why-do-we-use-plus-or-minus-in-square-root
Why do we use plus or minus in square root? – GeeksforGeeks
We can see that 7 is a whole number, therefore, 49 is a perfect square. Why do we use plus or minus in square root? Answer: If we want both the positive and the negative square root of a radicand then we put the symbol ± (read as plus minus) in front of the root. The numbers that are not a perfect square are members of the irrational numbers. This means that numbers or square root can’t be written as the quotient of two integers.

https://www.quora.com › Why-do-we-use-a-plus-or-a-minus-sign-in-a-square-root?share=1

https://www.quora.com › Why-do-we-use-a-plus-or-a-minus-sign-in-a-square-root?share=1
Why do we use a plus or a minus sign in a square root? – Quora
Original: Do I always need a plus or minus sign when taking a square root? Hello! No actually, you NEVER use a plus or minus sign while taking a square root. Before you think I’m an idiot, let me clear somethings first. What is √25? ±5 or just +5. Well, the answer is the latter, that is, just the positive 5. BUT, if. x² = 25. x = ±√25. then, x =±5. why?

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Why does plus minus appear when taking square roots – YouTube
Why do we need to take the plus minus of a number when taking square roots to solve for x?A commonly misused solution used by beginners of algebra is to take…

https://brilliant.org › wiki › plus-or-minus-square-roots

https://brilliant.org › wiki › plus-or-minus-square-roots
Does a square root have two values? | Brilliant Math & Science Wiki
Why some people say it’s true: That’s exactly what I was taught in school: when you take a square root, the answer is always plus or minus some value. Why some people say it’s false: When you square x , x, x , it becomes positive no matter what it was before; then, when you take the square root, it’s still positive.

https://math.stackexchange.com › questions › 1778970 › why-is-the-square-root-of-a-number-not-plus-or-minus

https://math.stackexchange.com › questions › 1778970 › why-is-the-square-root-of-a-number-not-plus-or-minus
Why is the square root of a number not plus or minus?
The answer: no, since the nonnegative number whose square is x 2 is not always x. But | x | is a nonnegative number and its square is x 2; therefore x 2 = | x |. Suppose that x 2 = 4; does that mean that x = ± 2 or just x = 2? The answer: it means x = ± 2.

https://www.purplemath.com › modules › why_plus.htm

https://www.purplemath.com › modules › why_plus.htm
Why the ± on the other side? | Purplemath
That is, while we place the ± sign on the side with the number, the plus-minus actually (technically) comes from the side with the variable, because the square root of the squared variable returns the absolute value of that variable.

https://www.wyzant.com › resources › answers › 144789 › if_you_square_root_1_is_the_answer_plus_or_minus_1_or_just_1

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if you square root 1, is the answer plus or minus 1 or just 1?
When you take the square root of a number, you should remember that it is both the positive and negative. For example, the square root of 4 is +/- 2. Squaring 2 gives you 4, as does squaring (-2). (-2)* (-2)=4 Squaring is a classic case of a double negative. I hope this helps! Upvote • 2 Downvote Add comment Report Mark M. answered • 09/17/15 Tutor

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Why does Plus Minus appear when taking Square root – YouTube
Master Concept. In this video i will tell you why does plus Minus appear when taking square root . #MATHEMATIC #Concepts By SIR SHAHID !!! MATHS CONCEPTS https://youtube.com/playlist?list=PL9 …

https://stackoverflow.com › questions › 24981936 › how-to-get-both-plus-and-minus-square-roots

https://stackoverflow.com › questions › 24981936 › how-to-get-both-plus-and-minus-square-roots
How to get both (plus and minus) square roots – Stack Overflow
You can see this message by using numpy.info (numpy.sqrt) in the python shell. Since every positive number has a pair square roots, if you want to print them all, just change you print statement to: print ‘Square roots of’,x,’are: +/-‘,np.sqrt (x) Share Improve this answer Follow answered Jul 27, 2014 at 15:05 WKPlus 6,705 2 34 52

https://www.wikihow.com › Add-and-Subtract-Square-Roots

https://www.wikihow.com › Add-and-Subtract-Square-Roots
How to Add and Subtract Square Roots: 9 Steps (with Pictures) – wikiHow
Simplify √ (45). First, you can factor it out to get √ (9 x 5). Then, you can pull out a 3 from the perfect square, 9, and make it the coefficient of the radical. So, √ (45) = 3√5. [6] Now, just add up the coefficients of the two terms with matching radicands to get your answer. 3√5 + 4√5 = 7√5 2 Do Example 2.

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