Basic intergration problem still stuck help.

[hornady]

The integral is t(4+9t)^(1/2) dt

I have tried u-sub and integration by parts but i can't figure it out.

u=4+9t
du=9 Does not help because i still have that t to deal with.

I have spent more time then i want to admit trying to figure it out, and there are plenty more in the hw.

Can someone help me out so i can move on with the assignment?

Thanks guys/gals.

 

[Bohrok]

Solve for t in u = 4 + 9t
and substitute it back into the first t in the integral.