Ответ:
Ab{-2-1;2-3}, AB{-3;-1} AC{0-1;-4-3}, AC{-1;-7} Ab*AC=(-3*-1)(-1*-7)=21
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Ответ:
Ab{-2-1;2-3}, AB{-3;-1} AC{0-1;-4-3}, AC{-1;-7} Ab*AC=(-3*-1)(-1*-7)=21