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What is the square root of -2? Answered

 I need to prove my math teacher wrong

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Burf

Best Answer 8 years ago

Square root (-2) = 1.41421356 i

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steveastrouk

8 years ago

Why is your math teacher wrong by the way ?

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bendog38steveastrouk

Answer 8 years ago

 Most of us 9th graders at North Canyon HS are right about math questions and like to make argue over just about everything.

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adam 101bendog38

Answer 8 years ago

as a freshman you should be quite and try to listen to your math teacher. believe it or not he (or she) is pretty smart, probably smarter than you. show some respect, teachers are underpaid, under appreciated, and esential to society.

P.S. sorry about the mini rant

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bendog38adam 101

Answer 8 years ago

 Dude, mini-rant's fine, but you have good advice.

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jeff-obendog38

Answer 8 years ago

Ha, we did that in school as a stall tactic.

In retrospect, it was a stupid thing to do, and I wish we'd learned more math.

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steveastroukjeff-o

Answer 8 years ago

Yes, you have no understanding of complex numbers just because you can say j root (2).

If you really want to "be right", learn some more math, instead of parroting things you've picked up on internet forums. Sure as hell, if you tried it on with me in a maths class, I would ask you for a detailed explanation of your analysis.

Steve

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gmoon

8 years ago

You cannot do it with "real" numbers. No "real" number times itself can ever be negative, only positive.

You need to use complex or imaginary number sets to take a - SqrRt .

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adam 101gmoon

Answer 8 years ago

however, keep in mind that even though they are imaginary they do exist. they are just as real as "real numbers"

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gmoonadam 101

Answer 8 years ago

Well, they are just a conceptual as "real" numbers... All numbers are a "construct."

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the_mad_man

8 years ago

 the square root of any negative number is always going to be i. this is because there is no number which you can square to get a negative number, it will always be positive.

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orksecuritythe_mad_man

Answer 8 years ago

No. i is specifically square root of -1. Square root of -2 is the square root of 2 times the square root of -1. Burf has the right answer.

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lemonie

8 years ago

You need to invoke i.
-2 = -1 x 2
so (root) -2 = (root) (-1 x 2),
which is (root) 2i (i being (root) -1

L