Упростите выражение и наидите его значение: 3a(a - 4) - 1, 5a(2a - 4) * npua = - 3

3a(a - 4) - 1.5(2a - 4) = 3a(a - 4) - 1.5a * 2(a - 2) = 3a(a - 4) - 3a(a - 2) = 3a(a - 4 -(a - 2)) = 3a(a - 4 - a + 2) = 3a * (-2) = -6a
-6 * (-3) = 18