Hey guys, just a simple question. I know that you CAN'T take the square root of a negative number, but is this possible, taking the square root of -x?

Question

hartnn · Answer

do you know about imaginary number $i=\sqrt{-1}$
?

anonymous · Answer

umm, i cant write the equation bc the equation button is not working for me. I have heard of them, but never used them. I know they have to do with a negative under the square root.

anonymous · Answer

but im working on a question and i got -x under a square root, is it possible?

hartnn · Answer

yes, ofcourse it is possible
but if imaginar or complex numbers are not yet introduced to you, you should not get an example of imaginary number.


can i have the original question, just to make sure ?

hartnn · Answer

bdw, 
$\sqrt{-x} = \sqrt{-1}\sqrt{x}=i\sqrt{x}$ if x is positive
and $\sqrt{-x} = \sqrt{|x|}$ if x is negative

anonymous · Answer

umm the equation button is not working for me, i think i will just ask my prof