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Find the integral int(1)/(5-8x-x^(2))dx ...

Find the integral `int(1)/(5-8x-x^(2))dx`
A.`(1)/(2sqrt(21))log|(sqrt(21)+(x+4))/(sqrt(21)-(x+4))|+C`
.B.`(1)/(2sqrt(21))log|(sqrt(21)-(x+4))/(sqrt(21)+(x+4))|+C`
C. `(1)/(sqrt(21))log|((x+4)+sqrt(21))/((x+4)-sqrt(21))|+Cquad `
D.`(1)/(sqrt(21))log|((x+4)-sqrt(21))/((x+4)+sqrt(21))|+C`

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