所以x2﹣1=0,解得x=1或x=﹣1.
当x=1时,A={1,﹣2,0},B={1,0,﹣2}满足条件.
当x=﹣1时,A={1,﹣2,0},B={1,0,4},集合A=B不成立,舍去.
所以x=1
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