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A2 b2 c2. A2+2ab+b2. A2 b2 a2 2ab+b2. (A+B)^2=(A^2+ab+b^2). (A+B)2=a2+2ab+b2.
A2+2ab+b2. A2 b2 a2 2ab+b2. (A+B)^2=(A^2+ab+b^2). (A+B)2=a2+2ab+b2.

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