Which of the following radical equations has only extraneous solution(s)? What are the extraneous solution(s)? A. x=x+72−−−−−√;−8
B. x−−√+1=x−17−−−−−√;81
C. x−−√−5=20;625
D. x−4−−−−−√=16−4x−−−−−−√;5

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