Quadratic Equation
Math
Discriminant1
x₁2
x₂1
About the Quadratic Equation calculator
Use this free Quadratic Equation calculator. Enter a, b, c and it shows discriminant, x₁, x₂ instantly. With the default values, the discriminant comes to 1.
How the Quadratic Equation calculation works
For ax² + bx + c = 0, x = (−b ± √(b² − 4ac)) ÷ 2a. The discriminant b² − 4ac decides the number of real roots.
Tip: If the discriminant is negative, the roots are complex numbers.
Frequently asked questions
What does the Quadratic Equation calculator do?
It takes a, b, c and instantly calculates discriminant, x₁, x₂.
Is the Quadratic Equation calculator free?
Yes. It is free, needs no signup and runs in your browser, so your numbers are not stored.
Which currency does it use?
Amounts are plain numbers, so use any currency consistently.
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