Răspuns:
( 1 + i ) × ( 2 + i ) × ( 3 - i )
( 2 + i + 2i + i² ) × ( 3 - i )
( 2 + i + 2i - 1 ) × ( 3 - i )
( 1 + 3i ) × ( 3 - i )
3 - i + 9i - 3i²
3 - i + 9i - 3 × ( - 1 )
3 - i + 9i + 3
6 + 8i
