Answer
-16, -8, 8, 16
Work Step by Step
x$^2$+(-16)x+15=(x-1)(x-15)
x$^2$+(-8)x+15=(x-3)(x-5)
x$^2$+(8)x+15=(x+3)(x+5)
x$^2$+(16)x+15=(x+1)(x+15)
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.