last problem, integration

[bcddd214]

???x^2/?(16-x^2 ) dx?

all of the posting I put up tonight are under a serious time crunch.
I am beyond learning it. I just need correct solutions so I can write them 20 times and commit to memory.
very sincerely,

 

[tkhunny]

The difficulty with this method is your usage of volunteers' time. If you need instant answers, you should consider paying for them.

Try a substitution. The sine function will help you.