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[[Fasciculus:Quadratic function.png|thumb|Functio y = 6x<sup>2</sup> + 4x + 8. [[Graphum (mathematica)|Graphum]] aequationis quadraticae est [[parabola]].]]
3.) <math> x^2 + px + q = (x - x_{1}) \cdot (x - x_{2}) </math> (expressio termini quadratici per factores lineares)"
== Nexus externi ==
* [https://mathworld.wolfram.com/QuadraticEquation.html De aequationibus quadraticis] in encyclopaedia ''Wolfram MathWorld'' {{ling|Anglice}}
[[Categoria:Algebra]]
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