MHB Definite integral of square root+cube root

tree21c
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Dear all,

Please solve this integral:

View attachment 7576

I tried integral by substitution, but failed.

Wolframalpha shows the result is 6, but I don't know how to proceed it.

Can it be solved by elementary function?
 

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Hello and welcome to MHB! :D

We ask that our users show their progress (work thus far or thoughts on how to begin) when posting questions. This way our helpers can see where you are stuck or may be going astray and will be able to post the best help possible without potentially making a suggestion which you have already tried, which would waste your time and that of the helper.

Can you post what you have done so far?
 
tree21c said:
Can it be solved by elementary function?

No; I don't think so.
 
Try applying the formula

$$\int\sqrt {x^2+a^2}dx=\frac{x\sqrt {x^2+a^2}}{2}+\frac{a^2}{2}ln(x+\sqrt {x^2+a^2})$$
 

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