Author 
Comment/Response 
Emily

09/10/09 04:58am
I'm trying to solve some equations in mathematica and need to make some assumptions about the variables e.g. x is positive. I'm not sure how to do this. As a simple example I tried
Assuming[x > 0, Simplify[Solve[x^2 == 9, x]]]
expecting to just get the output x=3. However, mathematica gave me the output x=3 and x=3. How do I get it to solve this equation with x restricted to positive values?
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