Equation Calculator
Solve linear, quadratic, and cubic equations with step-by-step solutions.
Published by:
isCalculator Editorial Team
Reviewed by:
Review Board
Last Updated:
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How to use this tool?
This calculator solves linear, quadratic, and cubic equations. Follow these steps:
- Select Equation Type from the dropdown: Linear (ax + b = 0), Quadratic (ax² + bx + c = 0), or Cubic (ax³ + bx² + cx + d = 0).
- Enter coefficients in the input fields. Use decimal numbers if needed (e.g., 2.5). All coefficients are required.
- Click "Solve" to compute the solution(s).
- View the result displayed in green, along with step-by-step reasoning below it.
Important notes:
- For linear equations, a cannot be zero (otherwise no or infinite solutions).
- For quadratic and cubic equations, the leading coefficient (a) must be non-zero.
- Results show up to 4 decimal places. Complex roots are displayed with i.
- If you see an error, check your inputs and try again.
Previous Results
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Frequently Asked Questions
It solves linear (ax+b=0), quadratic (ax²+bx+c=0), and cubic (ax³+bx²+cx+d=0) equations with real coefficients.
Yes, it provides a step-by-step breakdown of the solution method.
Yes, for quadratic equations with negative discriminant, it displays complex roots in the form a ± bi.
