biquadratic

== English == === Etymology === From bi- +‎ quadratic. === Adjective === biquadratic (not comparable) (mathematics) Of a polynomial expression, involving only the zeroth, second, and fourth powers of a variable, as x4 + 3x2 + 2. Sometimes extended to any expression involving the biquadrate or fourth power (but no higher powers), as x4 − 4x3 + 3x2 − x + 1. ==== Derived terms ==== ==== Translations ==== === Noun === biquadratic (plural biquadratics) (mathematics) A biquadratic equation. ==== Related terms ==== quadratic quartic