По Поля a={4, -2 ,-4} b={6,-3, 2} 2a-b = 2x{4, -2 ,-4} - {6,-3, 2} = {8, -4 ,-8} - {6,-3, 2} = {2, -1, 10} |2a-b| = кв. корень (4 + 1 + 100) = кв. корень (105)