Simple integration (area under the curve) - help I'm currently doing a simple integration question: 

Here is my working/solution so far:

I have calculated this several times and only be seem to be getting a negative number as the final result. I know this is wrong as it is an area that needs to be calculated and therefore cannot be a negative number.
Any help on this is very much appreciated. Thank you!

You should notice that the function is negetive from 2 to $\infty$(because 2 is a max point and f decrease for every $x>2$), so you need to multi
