(a²+b²+c²+2ab+2bc+2ca)-(a²+b²+c²-2ab+2bc-2ca)
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Answer:
4ab +4ac
4(ab + ac)
this is the answer
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a^2+b^2+c^2+2ab+2bc+2ca-a^2-b^2-c^2+2ab-2bc+2ca
4ab+4ca
4(ab+ca)
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