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(x*Sqrt[9 + 4*x^2])/2 + (9*ArcSinh[(2*x)/3])/4


Integrate[Sqrt[9 + 4*x^2], x] ==
(x*Sqrt[9 + 4*x^2])/2 + (9*ArcSinh[(2*x)/3])/4



                      2
Integrate[Sqrt[9 + 4 x ], x] == 

                             2 x
              2    9 ArcSinh[---]
x Sqrt[9 + 4 x ]              3
---------------- + --------------
       2                 4

Time to compute: 0.02 second

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