I swear every time I get away from basic Algebra for a while I forget everything. Boy do I feel dense! I have the following formula. L = P * (P - 1) But I want the formula so I can plug in L and get a value for P. I kind of did it brute force and the best I could figure is that P = SQRT(L), then round up the result. But somehow I don't think that is exactly right. Could someone please help me here? Please just don't give the answer show me how to factor it. I think it is: L= P^2 - P but that is were I get stuck. Not sure how to proceed from there.