Answer
(-4,1]
Work Step by Step
The union of 2 sets is is all combination of all of the numbers in the 2 sets. In this case, numbers that are in (-4,0) [-2,1] or both. Therefore, the set is (-4,1]
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.