Find the integral ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}x{e}^{9x^2}dx$ by making a substitution. This can be transformed into a basic integral by setting up the substitution:

A$.u=$ and

B$.du=$

Remember to enter the differential in part B$.$

C$.$ Now find the antiderivative using the substitution method.

Your answer should be in terms of the original variable, $x.$

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${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}x{e}^{9x^2}dx=$

Remember to add an uppercase $C,$ and make sure to put it in the main line of the answer $($not in an