1.

(a+b)2 + (b+c)2 =

A. A2 + 2b2 + 2ab + c2 + 2bc
B. A2 + b2 + c2 + 2ab + 2bc
C. A2 - b2 + c2 + 2ab + 2bc
D. 2a2 + 2b2 + 2c2 + ab + bc
Answer» B. A2 + b2 + c2 + 2ab + 2bc


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