Question

Z1=1+I Z2= -2-3i then find Z1+Z2 bar

Answer 1

Answer:

z

1

z

2

=

(

1−i

)

(1−i)(−2+4i)

=

1+i

(−2+4)+i(2+4)

=

1+i

2+6i

=

1+i

2+6i

×

1−i

1−i

=

1+i

(2+6)+i(6−2)

=4+2i

Thus, Im(

z

1

z

1

z

2

)=2