Question

integral of 3x^2 4sprt of 9+3x^3 dx

Answer 1

depending on notation .... try a by parts run; poly go to zero rather easily

Answer 2

do a substitution of u=9+3x^3
then du =.... ?
(in your question,combine the x^2 with dx)

Answer 3

\[\huge \int {3x^2~\sqrt[4]{9+x^3}dx}\] is it ?

Answer 4

that does make it easier to assess :)

Answer 5

you could write the integral as integral of (9+x^3)^1/4 dx^3

Answer 6

Try u substitution. \[u = 9+ x ^{3}\]

\[\frac{ du }{ dx } = 3x ^{2}\]

\[du = 3x^{2} dx\]

then \[\int\limits_{?}^{?} \sqrt[4]{u} du\]