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**florx** Thank you Prove It. I just noticed I wrote down the question wrong on my paper. I wrote down y = x^2 + x - 1 instead of y = x^2 + x - 2. No wonder I couldn't get the answer.

Anyways could you help me on another problem.

x^2 + (y-1)^2 = 1; about the y-axis

If I solve for y, I get y = sqrt(1-x^2) + 1

And if you graph that equation you would see that the points does not even touch the x-axis. How do you find the limits for this problem so that you can integrate it. The answer should be 4pi/3.