If a = 2017, b = 2016 and c = 2015, then what is the value of a2 + b2 – McqOptions

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1.	If a = 2017, b = 2016 and c = 2015, then what is the value of a2 + b2 + c2 - ab - bc - ca?
A.	-2
B.	0
C.	3
D.	4
Answer» D. 4

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