( 2a-3b-c ) whole spuare
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Answer:
[2a-3b-c]2
formula is [a+b+c]2=a2+b2+c2+2ab+2bc+3ca
=[2a]2+[-3b]2+[-c]2+2[2a][-3b]+2[-3b][-c]+2[-c][2a]
4a2+9b2+c2-12ab+6bc-4ca
this is the answer
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it is absolutely correct
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