यदि x^2 + y^2 - 4x -4y +8 =0, तो x-y का मान है – McqOptions

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1.	यदि x^2 + y^2 - 4x -4y +8 =0, तो x-y का मान हैं-
A.	1
B.	5
C.	7
D.	0
Answer» E.

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