SOLUTION: r^2+8=4 can you help me sove the question above?

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Question 710077: r^2+8=4
can you help me sove the question above?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
r^2+8=4
r^2=4-8
r^2=-4
r=sqrt-4
r=+-2i ans.