यदि x= b+ c-2a , y=c+a -2b तथा z= a+b -2c हो तो x^ – McqOptions

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1.	यदि x= b+ c-2a , y=c+a -2b तथा z= a+b -2c हो तो x^2 +y^2 -z^2 + 2xy का मान होगा -
A.	1/2
B.	0
C.	8
D.	9
Answer» D. 9

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