Question

use integration by parts to evaluate the integral

Answer 1

\[\int\limits_{}^{} (x^2 + 2x) \cos dx\]

Answer 2

I guess my u = x^2 + 2x and dv = cosx

Answer 3

so du = 2x + 2 and v = sinx

Answer 4

ok if you do that then set up the integral using the pattern forr integration by parts

Answer 5

if it was me, i would distribute first
might not make a difference, but it would look nicer

Answer 6

distribute what?

Answer 7

\[\int x^2\cos(x)dx+2\int x\cos(x)dx\]

Answer 8

oh!!! I did not even notice that thanks

Answer 9

\[x\cos(x)\] is real real fast, the other takes two steps