FormDiscriminant

The discriminant $D = b^2 - 4ac$ of a QuadraticForm.

FormDiscriminant(form)$b^2-4ac$

Typed signatures

Type	Package	Applies
(expression<QuadraticForm>) -> integer	modular	always

Domain: The modular group

Examples

Basic #

$b^2-4ac = 9+16$

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In$\mathrm{FormDiscriminant}(\mathrm{QuadraticForm}(1, 3, -4))$Out$25$

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Examples	1

See also: QuadraticForm, FormClassNumber