Can i solve using partial fractions?

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Homework Help Overview

The discussion revolves around the integral ∫(x+1)/(x²+2x+3)dx, specifically exploring the possibility of solving it using partial fractions. The problem is situated within the context of calculus and integration techniques.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to understand how to apply partial fractions to the integral, having initially used u-substitution. Some participants suggest completing the square for the denominator, while others question the factorization of the quadratic expression.

Discussion Status

The discussion is ongoing, with participants exploring different methods to approach the problem. Some guidance has been offered regarding completing the square, and there is an acknowledgment of the complexity introduced by the quadratic's roots.

Contextual Notes

Participants are grappling with the implications of using complex numbers in the factorization of the quadratic polynomial and the relevance of completing the square in this context.

johann1301
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Homework Statement



∫(x+1)/(x2+2x+3)dx

The Attempt at a Solution



This problem was under partial fractions in my book. I solved it using u-substitution where u=x2+2x+3, but i can't see how it can be solved using partial fractions?

can it?
 
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Yeah, you could, but it's a lot of extra work.

Hint: Complete the square in the denominator.
 
(x^2+2x+3)=(x+3)(x+1)?
 
no, i see that's not right..
 
I get that (x^2+2x+3) = (-1-√2i)(-1+√2i).
 
but their complex... will this work?
 
sorry, (x^2+2x+3) = (x+1+√2i)(x+1-√2i).
 

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