For which intervals is the function negative?
Select each correct answer.
(−∞,−3)
(−1.5, 4.2)
(−3,1)
(1,4)
(4,∞)
(−2.5,2.5)
Link to picture: https://static.k12.com/nextgen_media/assets/8124902-DP057_264_001.png
I understand that it's not (−3,1) or (4,∞), but I don't know if the rest are ALL the correct answers :'-(
