а) (2-4i) + (3+i) = 2 + 3 - 4i + i = 5 - 3i
б) (3+7i) - (-2-3i) = 3 + 2 + 7i + 3i = 5 + 10i
в) (10-3i)(1-6i) = 10 - 60i - 3i + 18i^2 = 10 - 63i - 18 = -8 - 63i
г) (4-4i)^2 = (4-4i)(4-4i) = 16 - 16i - 16i + 16i^2 = 16 - 32i - 16 = 0 - 32i = -32i
д) (5-2i)/(3+i) = ((5-2i)(3-i))/((3+i)(3-i)) = (15 - 5i - 6i + 2i^2) / (9 - 3i + 3i - i^2) = (15 - 11i - 2) / (9 + 1) = 13 - 11i / 10 = 1.3 - 1.1i
а) (2-4i) + (3+i) = 2 + 3 - 4i + i = 5 - 3i
б) (3+7i) - (-2-3i) = 3 + 2 + 7i + 3i = 5 + 10i
в) (10-3i)(1-6i) = 10 - 60i - 3i + 18i^2 = 10 - 63i - 18 = -8 - 63i
г) (4-4i)^2 = (4-4i)(4-4i) = 16 - 16i - 16i + 16i^2 = 16 - 32i - 16 = 0 - 32i = -32i
д) (5-2i)/(3+i) = ((5-2i)(3-i))/((3+i)(3-i)) = (15 - 5i - 6i + 2i^2) / (9 - 3i + 3i - i^2) = (15 - 11i - 2) / (9 + 1) = 13 - 11i / 10 = 1.3 - 1.1i