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Question 46214: Image Hosted by ImageShack.us
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
+sqrt%2849%29+ is +7 or -7
So, likewise +-+sqrt%2849%29+ is +7 or -7

So this is equivalent to -7.

+sqrt%28-49%29+ is not solveable (at least not until you do maths at higher levels).

Jon