<wikieditor-toolbar-tool-file-pre>Example.jpg]]
I think a better hint would be:
If u = x , {\displaystyle u={\sqrt {x}},} then x = u 2 {\displaystyle \displaystyle {x=u^{2}}} and d x = 2 u d u {\displaystyle \displaystyle {dx=2u{\text{ }}du}}
Hey Kyle,
I think using the talk page of the question itself instead of this subpage will be more useful. I just found this. Cheers,