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Quadratic Equation Calculator

The calculator will solve the quadratic equation step by step either by completing the square or using the quadratic formula. It will find both the real and the imaginary (complex) roots.

Related calculator: Discriminant Calculator

Enter a quadratic equation:

For example, x^2+4x+3=0 or x^2+4=5x.

Choose a method:

If the calculator did not compute something or you have identified an error, or you have a suggestion/feedback, please write it in the comments below.

Related Notes: What is Quadratic Equation , Incomplete Quadratic Equations , Solving Quadratic Equations by Completing the Square , Quadratic Equation Formula and the Discriminant , Viet Theorem