For what values of xxx is x4−5x2+4<0x^4 - 5x^2 + 4 < 0x4−5x2+4<0?
(−2,−1)∪(1,2)(-2, -1) \cup (1, 2)(−2,−1)∪(1,2)
(−2,2)(-2, 2)(−2,2)
(−1,1)(-1, 1)(−1,1)
(−∞,−2)∪(2,∞)(-\infty, -2) \cup (2, \infty)(−∞,−2)∪(2,∞)