Дано: z₁= 5 + i, z₂ = 8 - i.
Найти 1) z₁+z₂; 2)z₁ - z₂; 3) z₁·z₂; 4)z₁/z₂
Решение
1) z₁+z₂ = 5 + i + 8 - i = 5 + 8 + i - i = 13
2) z₁ - z₂ = 5 + i - (8 - i) = 5 - 8 + i + i = -3 + 2i
3) z₁·z₂ =(5 + i)·(8 - i) = 5·8 - 5i + 8i - i² = 40 + 3i - (-1) = 41 + 3i