Question

复数

(2-i)2

i

（i是虚数单位）等于（　　）

A．4+3i

B．4-3i

C．-4+3i

D．-4-3i

Answer 1

(2-i)2

i

=

4-4i-1

i

=

3-4i

i

=

(3-4i)(-i)

-i2

=-4-3i．
故选D．