СЛ Светлана Лимперова A) v18b-3v3a+v12a-4v2b=v2*9*a-3v3a+v3*4a-4v2b=3v2*8-3v3*3+2v3*3-4v2*8=3v16-3v9+2v9-4v16=3*4-3*3+2*3-4*4=12-9+6-16=-7