Evaluate - - 1 x 2 - 8 x - 20 d x

[ ∫ dx x^ 2 +8x+20 #160; #160;; =∫ dx ( x+4 ) #160; ^ 2 +4 #160; ...

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Question

Evaluate : $\int \frac{1}{x^{2} + 8 x + 20} d x$

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