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Polynomial Calculator

Evaluate a quadratic polynomial ax² + bx + c at a chosen value of x.

How it works Report a problem

Polynomial Calculator

Fast and accurate dynamic formulas

ax² + bx + c x² + x + @ x =
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About the Polynomial Calculator

Evaluate a quadratic polynomial ax² + bx + c at a chosen value of x.

How to use the Polynomial Calculator

  1. Enter the coefficients a, b and c.
  2. Enter the value of x.
  3. Use Add Polynomial Field for more expressions.

Formula and method

P(x) = a·x² + b·x + c

Worked example

With a = 1, b = −3, c = 2 and x = 4: 16 − 12 + 2 = 6.

Tips

  • The roots are the x-values where P(x) = 0. Use the Quadratic Equation Calculator to find them.

Frequently asked questions

What is the degree of a polynomial?
The highest power of x. A quadratic has degree 2.