biquadratic

  1. Adjective.  (mathematics) Of a polynomial expression, involving only the second and fourth powers of a variable, as ''x''4 + 3''x''2 + 2. Sometimes extended to any expression involving the fourth power of variable (but no higher powers), as ''x''4 − 4''x''3 + 3''x''2 − ''x'' + 1.
  2. Noun.  (math) A biquadratic equation.

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This entry was last updated on RefTopia from its source on 3/20/2012.