If a2 + b2 + c2 - ab - bc - ca = 0 then a : b : c is? – McqOptions

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1.	If a2 + b2 + c2 - ab - bc - ca = 0 then a : b : c is?
A.	: 2 : 1
B.	: 1 : 1
C.	: 1 : 2
D.	: 1 : 1
Answer» E.

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