Equation solver
Equation solver: formula a × x² + b × x + c = 0, custom inputs and copyable results. Free calculation in your browser.
Enter a, b and c for ax² + bx + c = 0. Supports quadratic and linear equations and complex roots; ℝ means infinitely many solutions and ∅ none. Finite coefficients from −10¹² to 10¹². Roots use 12 significant digits.
Result
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Formula and instructions
a × x² + b × x + c = 0
Enter a, b and c for ax² + bx + c = 0. Supports quadratic and linear equations and complex roots; ℝ means infinitely many solutions and ∅ none. Finite coefficients from −10¹² to 10¹². Roots use 12 significant digits.
Frequently asked questions
Which formula does this tool use?
a × x² + b × x + c = 0 Enter a, b and c for ax² + bx + c = 0. Supports quadratic and linear equations and complex roots; ℝ means infinitely many solutions and ∅ none. Finite coefficients from −10¹² to 10¹². Roots use 12 significant digits.