SOLUTION: How do I solve the equation "r^2=the square root of -624"?

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Question 392989: How do I solve the equation "r^2=the square root of -624"?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
r%5E2+=+-624

Taking square root of both sides,

r%5E2+=+0+%2B-+sqrt%28-624%29+=+0+%2B-+sqrt%28624%29i+=+0+%2B-+4sqrt%2839%29i