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Principal Square Root. The unique nonnegative square root of a nonnegative real number. For example, the principal square root of 9 is 3, although both and 3 are square roots of 9.
Answer 1 : The only answer is Ï^-1i The square root of - 1 is i so i times the square root of pi is equal to the square root of negative pi Answer 2 : More concretely , the squar â¦e root of negative pi is approximately 1.772453850905i , wherein the 1.772453850905 represents an approximation of pi , and  i  , which should be a lower case cursive  ...