Business Calculus
(−4,0)(-4,0)
(5,∞)(5,\infty)
(−4,0)∪(5,∞)(-4, 0) \cup (5, \infty)(−4,0)∪(5,∞)
(−5,0)∪(4,∞)(-5,0)\cup(4,\infty)