biquadratic
(adjective)
When a polynomial involves only the second and fourth powers of a variable.
Examples of biquadratic in the following topics:
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Other Equations in Quadratic Form
- For example, if a quartic equation is biquadratic—that is, it includes no terms of an odd-degree— there is a quick way to find the zeroes of the quartic function by reducing it into a quadratic form.