A.  x2+y2+x-y-1=0

B.  6(x2+y2)+x-y-1=0

C.  x2+y2+6(x-y)-1=0

D.  6x2+6y2+6x-6y-1=0

1
Correct Answer :
6(x2+y2)+x-y-1=0
Explanation :
No Explanation available for this question

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