A) (1+5i)+(2+3i) = 1+5i+2+3i = 3+8i
б) (1-4i)-(2+3i) = 1-4i-2-3i = -1-7i
в) (3-2i)(4+2i) = 12+6i-8i-4i² = 12-2i-4*(-1) = 12-2i+4 = 16-2i
г) (1-i)² = 1²-2*1*i+i² = 1-2i+(-1) = 1-2i-1 = -2i
д) i(3+i) = 3i+i² = 3i+(-1) = -1+3i
A) (1+5i)+(2+3i) = 1+5i+2+3i = 3+8i
б) (1-4i)-(2+3i) = 1-4i-2-3i = -1-7i
в) (3-2i)(4+2i) = 12+6i-8i-4i² = 12-2i-4*(-1) = 12-2i+4 = 16-2i
г) (1-i)² = 1²-2*1*i+i² = 1-2i+(-1) = 1-2i-1 = -2i
д) i(3+i) = 3i+i² = 3i+(-1) = -1+3i