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$\int\frac{x^2-1}{x^2+2x+1}dx$
Learn how to solve integral calculus problems step by step online. Find the integral of (x^2-1)/(x^2+2x+1). Find the integral. The trinomial x^2+2x+1 is a perfect square trinomial, because it's discriminant is equal to zero. Using the perfect square trinomial formula. Factoring the perfect square trinomial.