Answer
$-8,-5,-3$.
Work Step by Step
According to the graph there are $3$ values at which the value of the function is $0$ (this means it is an x-intercept), at $-8,-5,-3$.
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.