Question

(1/2 - 4i) x (2 - 3/5i) = ?

Answer 1

(1/2 - 4i) x (2 - 3i/5)  

=(1/2) * (2 - 3i/5)    -4i* (2 - 3i/5)  


=1 -3i/10 -8i + 12i²/5

=1 -3i/10 -8i - 12/5

=1 -3i/10 -80i/10 - 12/5

=5/5 -83i/10 - 12/5  =-( 7/5 +83i/10)