Answer
The answer is below.
Work Step by Step
They are opposites because the second fraction is equal to the first fraction multiplied by -1. Thus, the result of adding them should be 0, for whenever opposites are added, the result is 0.
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.