SOLUTION: Evaluate, the radical expression if possible. This is suppose to be a radical sign √ but this is as close as I could get. √-21

Algebra ->  Radicals -> SOLUTION: Evaluate, the radical expression if possible. This is suppose to be a radical sign √ but this is as close as I could get. √-21       Log On


   

Question 78047: Evaluate, the radical expression if possible.
This is suppose to be a radical sign √ but this is as close as I could get.
√-21
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28-21%29

Since the square root of 21 cannot be reduced any further (it has no perfect square factors) we can only reduce the problem to
sqrt%2821%29i where i=sqrt%28-1%29