Solve the inequality: x4−10x2+9<0x^4 - 10x^2 + 9 < 0x4−10x2+9<0.
(−∞,−3)∪(3,∞)(-\infty, -3) \cup (3, \infty)(−∞,−3)∪(3,∞)
(−1,1)(-1, 1)(−1,1)
(−3,−1)∪(1,3)(-3, -1) \cup (1, 3)(−3,−1)∪(1,3)
(−3,3)(-3, 3)(−3,3)