Вычислим значение выражения:
z = 10 + (30i)/(1 - 2) - (1 + i)²/(2 - i) = 10 + (30i)/(-1) - (1² + 2 * 1 * i + i²)/(2 - i) = 10 - 30i - (1 + 2i + i²)/(2 - i) = 10 - 30i - (1 + 2i - 1)/(2 - i) = 10 - 30i - (2i)/(2 - i) = 10 - 30i - (2i * (2 + i)) / ((2 - i) * (2 + i)) = 10 - 30i - (4i + 2i²) / (2² + 1²) = 10 - 30i - (4i + 2 * (-1)) / (4 + 1) = 10 - 30i - (4i - 2) / 5 = 10 - 30i - (4/5)i + 2/5 = 10 + 2/5 - 30i - (4/5)i = 52/5 - (154/5)i
Ответ: 52/5 - (154/5)i