Asked by alk
                i got help with this problem a couple days ago. the answer and explanation given made sense to me but on my list of answers it said the the answer is suppose to be: 
r=[-pih+sqrt(pi^2h^2+2piA)]/2pi
 
if anyone can figure out how to get that thanks so much.
the original problem is:
A=2pir^2 + 2pirh
*solve for positive r
            
        r=[-pih+sqrt(pi^2h^2+2piA)]/2pi
if anyone can figure out how to get that thanks so much.
the original problem is:
A=2pir^2 + 2pirh
*solve for positive r
Answers
                    Answered by
            bobpursley
            
    It is directly from the quadratic equation.
    
                    Answered by
            alk
            
    i still don't understand what you are saying. can someone show me the work.
    
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