Remember:
             The Imaginary Unit is defined as

i = .

Whenever there is a negative under the radical sign, it comes out from underneath as i.

When simplifying these radical numbers in terms of i, follow the usual rules for simplifying radicals and treat the i with the rules for working with a variable. 

Examples:

 Number

bi Form

1

6i

              2  x  7i                         

14i

DeMarr