\[\int_{{}}^{{}}{\sqrt{{{x}^{2}}-8x+7}}\ dx=\]

1.	\[\int_{{}}^{{}}{\sqrt{{{x}^{2}}-8x+7}}\ dx=\]
A.	\[\frac{1}{2}(x-4)\sqrt{{{x}^{2}}-8x+7}+9\log [x-4+\sqrt{{{x}^{2}}-8x+7}]+c\]
B.	\[\frac{1}{2}(x-4)\sqrt{{{x}^{2}}-8x+7}-3\sqrt{2}\log [x-4+\sqrt{{{x}^{2}}-8x+7}]+c\]
C.	\[\frac{1}{2}(x-4)\sqrt{{{x}^{2}}-8x+7}-\frac{9}{2}\log [x-4+\sqrt{{{x}^{2}}-8x+7}]+c\]
D.	None of these
Answer» D. None of these

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\[\int_{{}}^{{}}{\sqrt{{{x}^{2}}-8x+7}}\ dx=\]

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