Answer
At $-2, 2$, where the values are $6,10$.
Work Step by Step
A local maximum is a value that is larger than or equal to all values in any surrounding area.
By this the local maximas are at $-2, 2$, where the values are $6,10$.
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.