If a = x + y, b = x y, c = x + 2y, then a2 + b2 + c2 ab bc ca is

If a = x + y, b = x y, c = x + 2y, then a2 + b2 + c2 ab bc ca

1.	If a = x + y, b = x y, c = x + 2y, then a² + b² + c² ab bc ca is
A.	4y
B.	5y
C.	6y
D.	7y
Answer» E.

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If a = x + y, b = x y, c = x + 2y, then a2 + b2 + c2 ab bc ca is

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If a = x + y, b = x y, c = x + 2y, then a² + b² + c² ab bc ca is