Integration by Parts Example Problems

Solutions to 6 integration by parts example problems.

[edelric]

I have a quick question. So for the first problem that ends at 2:47 you ended up taking the 9 out of the denominator of the last term (I assume by multiplying the whole equation by nine. Which is how you ended up with (9x-(x+3)) and then you proceeded to make the left fraction (x-3)^8/72. But wouldn't it make more sense to make that fraction 9(x-3)^8/8???

[aimisabrina]

hye, can i know, for question 5, why can't we use integration by substitution to solve the integrate v du part? why did you use ibp instead of ibs? or we can use both but we will get different answer?