If x = 2015, y = 2014, z = 2013, then the value of x2 + y2 + z2 - xy - – McqOptions

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1.	If x = 2015, y = 2014, z = 2013, then the value of x2 + y2 + z2 - xy - yz - zx is?
A.	3
B.	4
C.	6
D.	2
Answer» B. 4

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