+**4ac** is a fundamental component often found within the [Quadratic Formula](/wiki/Quadratic_Formula), a cornerstone of [Algebra](/wiki/Algebra). This simple expression, when combined with other terms, forms the discriminant, which reveals the nature of an equation's roots. It unveils whether solutions are real, unique, or complex, guiding the understanding of quadratic equations.
+## See also
+- [Discriminant](/wiki/Discriminant)
+- [Equation](/wiki/Equation)
+- [Roots](/wiki/Roots)
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