Question

упростите выражение (y-4) (y+2)-(y-2)​

Answer 1

$(y - 4) \times (y + 2) \times (y - 2) = \\ = (y - 4) \times ( {y}^{2} - 4) = {y}^{3} - 4y - 4 {y}^{2} + 16 = \\ = {y}^{3} - 4 {y}^{2} - 4y + 16$