Question

Ok, I need to add and simplify.
(4+7.9i )+ ( 5+7.3i)=
11.9i + 12.3i =
24.2i
(my question is do I leave the "i" (imaginary) in the answer or is it then removed?)

Answer 1

think of i as a variable

Answer 2

well you cant add 4 and 7.9i

Answer 3

just like you cant add 4 and 7.9x

Answer 4

so yeah think of i as a variable

Answer 5

so I do include it ?

Answer 6

yes you leave it there
just add the 4 and 5 together
and the 7.9i and 7.3i together

Answer 7

ok thanks everyone

Answer 8

then in the final answer leave the i