一元二次方程式求解器
求解 ax² + bx + c = 0，顯示實數或複數解與運算過程。
x²
+ x
+ Discriminant (Δ = b² − 4ac)
Roots
Working (quadratic formula)
How to use
- Enter the coefficients a, b, and c for your quadratic equation ax² + bx + c = 0.
- Click Solve. The discriminant (Δ = b² − 4ac) determines the nature of roots.
- If Δ > 0: two distinct real roots. If Δ = 0: one repeated root. If Δ < 0: two complex conjugate roots.
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常見問題
- Is this quadratic solver free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations happen locally in your browser with JavaScript.
- Does it work on mobile?
- Yes. Works on iPhone Safari and Android Chrome without installing any app.
Last updated: By jarvisbox