x2(x – 4)(2 + x2) = x2(2x + x3 – 8 – 4x2) = 2x3 + x5 – 8x2 – 4x4 = x5 – 4x4 + 2x3 – 8x2
Ответ: x5 – 4x4 + 2x3 – 8x2