(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://c811106.r6.cf2.rackcdn.com/se05h01043.png

2. Relevant equations

3. The attempt at a solution

The negative sign in front of x^2 is giving me trouble.

When i complete the square i get; [itex]\sqrt{}-x^2-4x+4 -4[/itex]

There's some algebra that i don't understand.

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# Trouble completing the square on the integral

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