Quadratic Equation Solver
Enter a, b and c to get the exact roots of ax² + bx + c = 0 — real, repeated, or complex — using the quadratic formula and its discriminant.
Solve ax² + bx + c = 0
FAQs
What does a negative discriminant mean?
It means the equation has no real roots — only a pair of complex conjugate roots (of the form p ± qi). The calculator shows these directly rather than reporting "no solution".
What if I enter a = 0?
With a = 0 the equation is no longer quadratic — it reduces to the linear equation bx + c = 0, which the calculator solves directly as x = −c ÷ b.
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