Polynomial Equation Solver

Free online polynomial equation solver. Solve polynomial equations of any degree with real and complex roots. Find solutions for linear, quadratic, cubic, and higher-degree polynomials.

A polynomial equation solver that finds all real and complex roots of polynomial equations of any degree.

What is a Polynomial Equation?

A polynomial equation is an equation of the form:

anxn + an-1xn-1 + ... + a1x + a0 = 0

where n is a non-negative integer (the degree), and a₀, a₁, ..., aₙ are coefficients with aₙ ≠ 0.

How Does the Polynomial Solver Work?

This calculator uses numerical methods to find polynomial roots:

  • For degree 1: Direct solution using linear equation formula
  • For degree 2: Quadratic formula for exact solutions
  • For degree 3: Cubic formula or numerical approximation
  • For degree 4+: Numerical root-finding algorithms (Newton-Raphson method)

Applications of Polynomial Equations

Polynomial equations are fundamental in mathematics and appear in various fields:

  • Physics: Motion equations, wave functions, and quantum mechanics
  • Engineering: Signal processing, control systems, and structural analysis
  • Economics: Cost functions, revenue optimization, and market modeling
  • Computer Graphics: Curve fitting and interpolation
  • Chemistry: Equilibrium calculations and reaction kinetics