Ok Verify so when x=0 and x=2 we know that the curve will have a y-value of zero at that point. thus those are the limits/whatever u call it u put onto the integrate symbol.
From there it is simple integration and then u sub in x=2 and x=0
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
. I think this should be right anyways...