(x+y)2 + (y+z)2 =

A.x2+y2+z2+2xy+4yz

B.x2+y2+z2+4xy+2yz

C.x2+2y2+z2+2y(x+z)

D.x2+2y2+z2+2x(y+z)

E.none

Show Answer

Answer=Option C

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