x2+(l + i)x+i = 0 A = (1+ż)2 -4i = 1 -+-2i — 1—4? =
.. 3n . 3T1
- 2i = 2 cos — +z sin-
2 2
r~ rr( 30 . . 3lT\
= y 2 cos-+z sin —
\ ^ 4 J
1
2