minus-plus sign

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minus-plus sign (plural minus-plus signs)

  1. (mathematics) the symbol , meaning "minus or plus", used alongside the plus-minus sign to show that a negative value is to be taken where the positive value is indicated by the plus-minus sign, and vice versa (as in (x ± 1) / (x ∓ 2), which means (x + 1) / (x - 2) and (x - 1) / (x + 2)).

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Last modified on 20 June 2013, at 15:32