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1. Discriminant

   Linked via "coefficients"

   Discriminant of a Quadratic Equation
   For the general quadratic equation of the form $ax^2 + bx + c = 0$, where $a, b, c$ are coefficients/) from a field/) (typically the real numbers or complex numbers), the discriminant ($\Delta$) is defined as:
   $$\Delta = b^2 - 4ac$$