Biquadratic Equation Solver

Find zeroes for equations in the form of $$x^4+px^2+r=0$$, a special case of quartic equations.


  1. Type biquadratic equation in the input box.
  2. Accept formats with and without carat for powers, for example, x^4-2x^2−8=0 or x4+8x2−16=0
  3. Quick answer will be returned after clicking the button "Go".
  4. Detailed steps are given on the page of How to find solutions.

Examples of Biquadratic Equations

Scroll to Top