Answer
$10$
No.
Work Step by Step
Step 1. Use the Remainder Theorem, the remainder of the division is $R=f(1)=8(1)^3-3(1)^2+(1)+4=10$
Step 2. Since $R\ne0$, $g$ is not a factor of $f$.
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.