Question

Need help with the substitute rule
i'll post the pic up in a sec
please and thank you :D

Answer 1

number 47

Answer 2

\[\int x(2x+5)^8~dx\]
Let \(u=2x+5\), then \(\dfrac{1}{2}du=dx\). Also, solving for \(x\) in the sub, you have \(x=\dfrac{u-5}{2}\):
\[\frac{1}{2}\int\left(\frac{u-5}{2}\right)u^8~du\]

Answer 3

i don't get the x part

Answer 4

@SithsAndGiggles

Answer 5

What don't you understand?

Answer 6

the x part