What this calculator does
Solve a linear equation ax + b = c or a quadratic equation ax² + bx + c = 0.
How it works
The calculator evaluates linear x = (c − b) ÷ a; quadratic x = [−b ± √(b² − 4ac)] ÷ 2a. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
4-
?equationType=Equation typeChoice · Required · Default: linear · Accepted values: linear, quadratic
-
?a=aNumber · Required · Default: 2
-
?b=bNumber · Required · Default: 3
-
?c=cNumber · Required · Default: 11
Outputs
3-
solutionSolutionText · Primary output
-
discriminantDiscriminant (quadratic)Number
-
verificationVerificationText
Inputs and results
The inputs are Equation type, a, b, c. Results include Solution, Discriminant (quadratic), Verification.