SOLUTION: ? X ? = -1
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Question 1053944
:
? X ? = -1
Found 3 solutions by
ikleyn, Alan3354, MathTherapy
:
Answer by
ikleyn(52788)
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? = "??"
Answer by
Alan3354(69443)
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makes no sense.
Answer by
MathTherapy(10552)
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? X ? = -1
A number times its negative reciprocal = - 1
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