I am having a hard time remembering how to find this type of integral:
integral from 0 to 3 of: (y^2)(9+(4(y^2)))^(1/2) dy
I thought it had some u-sub, but that didn't work because u would equal 9 + 4y^2 but then that would make du = 8y, which is not part of the integral. Could you please help me with this? Thanks in advance!