Quadratic Equation Solver
Solve quadratic equations online: real or complex roots, discriminant and vertex with steps. Free solver.
Solves equations of the form ax squared plus bx plus c equals zero.
Frequently asked questions
- What does the solver output?
- The discriminant, the roots (real or complex), the vertex coordinates and whether the parabola opens up or down.
- What if a is zero?
- The equation is linear, not quadratic, so the tool asks you to enter a non-zero a.
- How are complex roots shown?
- When the discriminant is negative, roots are given as a real part plus or minus the imaginary part times i.
- Does it show the working?
- The discriminant value tells you the nature of the roots, and the note restates the equation you are solving.
This tool runs entirely in your browser. No data is uploaded anywhere.