SOLUTION: is it possible to evaluate sqrt{{{-4}}}

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Question 81579: is it possible to evaluate sqrt-4
Answer by tutorcecilia(2152) About Me  (Show Source):
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Yes, but you will get an imaginary number.
%28sqrt%28-4%29%29
4i
.
You will not get a real number because there is no real number that can be squared and equal a negative number. For example: 2^2=4 and so does (-2)^2=4. Both will equal a positive 4. So the %28sqrt%284%29%29=+2 or -2.