SOLUTION: For what values of the variable does the following expression make sense: 3√a

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Question 1134203: For what values of the variable does the following expression make sense:
3√a
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
a can be any value greater than or equal to 0.
this makes the value of 3 * sqrt(a) real.
if a is less than 0, then the value of 3 * sqrt(a) is not real.
it is imaginary.

here's one reference dealing with imaginary numbers.

https://www.mathsisfun.com/numbers/imaginary-numbers.html