已知复数z=1-i,则z2z−1=_.

问题描述:

已知复数z=1-i,则

z2
z−1
=______.

∵已知复数z=1-i,则:

z2
z−1

=
(1−i) 2
1−i−1
=
−2i
−i
=2,
故答案为:2.