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## Homework Statement

Integrate: dx/sqrt(x^2+2x +5)

## Homework Equations

refer to above

## The Attempt at a Solution

I can integrate the equation dx/sqrt(1+x^2) using the rules

cosh^2 u - sinh^2 u = 1

cosh^2 u = 1+sinh^2 u

but i dont know where to start with this question because of the 2x + 5 in the denomentor. Could someone please point me in the right direction.