Respuesta :

Enstanding
I think it would be 0.72 i don't really know sorry just trying to help :) have a cool day
you need to distribute -1 into the second parenthesis as follows:

(1+6i)-(7+3i) = 1 + 6i - 7 - 3i

then combine like terms:

(1-7)    +  (6i - 3i)
=
-6    +  3i


Done





I hope that helps!