Find the integral.

A. -  x2 cos 3x + x sin 3x + C
B. - 3 x2 cos 3x + 18 x sin 3x + 54 cos 3x + C
C. -  x2 cos 3x + x sin 3x +  cos 3x + C
D.  x2 cos 3x - x sin 3x -  cos 3x + C

Answer: C

Mathematics

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