(2 + 2j)(1 - 5j) = 2 - 10j + 2j - 10j² = -10j² - 8j + 2
(2j + 1) - (6 + j) = 2j + 1 - 6 - j = j - 5
(4 + j)(4 - j) = 4² - j² = 16 - j²
1) 2-10j×2j-10j²
2) 12j+2j²×6+j
3)16-4j×4j-j²=16-j²
