00:01
Okay, here i want to integrate this function using parts.
00:05
And i make this one the u and this one the dv by dx.
00:13
In that way the power of x will decrease.
00:17
So the parts formula, u times v, so x squared, integrate e negative x.
00:25
I get negative e negative x.
00:28
Use brackets to avoid going wrong.
00:30
Integral of the same thing.
00:36
Times u dash 2x d x.
00:39
That's the first line of the answer, and that you should simplify before carrying on.
00:46
So minus x squared, e to the minus x plus 2 is a factor, integral of xe negative x d x.
01:01
And then repeat the process of parts integration...