Picture of (a+b+c)^2
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the answer is = 2a^+2b^+2c^
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(a+b+c)^2=(a+b+c)(a+b+c)
Which is equal to
a^2+b^2+c^2+2ab+2bc+2ca
Which is equal to
a^2+b^2+c^2+2ab+2bc+2ca
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