int sqrt(x^2-8x+7) is equal to...

`int sqrt(x^2-8x+7)` is equal to

A

`(1)/(2) (x-4) sqrt(x^2 - 8x +7 )+ 9 log [ x -4 + sqrt(x^2 - 8x +7 )] +c`

B

`(1)/(2) (x-4) sqrt(x^2 - 8x + 7 ) -3sqrt(2) log [x-4 + sqrt(x^2 - 8x+7)]+c`

C

`(1)/(2) (x-4) sqrt(x^2 - 8x + 7 ) -(9)/(2) log [x-4 + sqrt(x^2 - 8x+7)]+c`

D

None of these

Verified by Experts

The correct Answer is:

C

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