Answer
$f(x) - g(x)$
Work Step by Step
RECALL:
$(f-g)(x) = f(x) - g(x)$.
Thus, the missing expression in the given statement is
$f(x) - g(x)$.
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.