Find the set of all xxx such that ∣x2−1∣<3|x^2 - 1| < 3∣x2−1∣<3.
(−2,2)(-2, 2)(−2,2)
(−2,−1)∪(1,2)(-2, -1) \cup (1, 2)(−2,−1)∪(1,2)
(−2,2)(-\sqrt{2}, \sqrt{2})(−2,2)
(−2,2)∖{0}(-2, 2) \setminus \{0\}(−2,2)∖{0}