Answer
$11$
Work Step by Step
By combining like terms, the expression $
(7+4i)+(4-4i)
$ simplifies to
\begin{array}{l}
(7+4)+(4i-4i)
\\=
11
.\end{array}
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.