AC=(-5;1)
СВ={-2+5; -2+(-1)}={3;-3}
АС*СВ=-5*3-1*3=-18
ответ 2
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AC=(-5;1)
СВ={-2+5; -2+(-1)}={3;-3}
АС*СВ=-5*3-1*3=-18
ответ 2