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In elementary algebra, the quadratic formula is a formula that provides the solution(s) to a quadratic equation. There are other ways of solving a quadratic equation instead of using the quadratic formula, such as factoring (direct factoring, grouping, AC method), completing the square, graphing and others. Given a general quadratic equation of the form with x representing an unknown, with a, b and c representing constants, and with a ≠ 0, the quadratic formula is: where the plus–minus symbol "±" indicates that the quadratic equation has two solutions. Written separately, they become:

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  • صيغة تربيعية (ar)
  • ABC-Formel (de)
  • Τετραγωνικός τύπος (el)
  • Rumus kuadrat (in)
  • Formule quadratique (fr)
  • 二次方程式の解の公式 (ja)
  • Wortelformule (nl)
  • Quadratic formula (en)
  • Fórmula quadrática (pt)
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  • الصيغة التربيعية (بالإنجليزية: Quadratic formula)‏ هي عبارة رياضية لحل المعادلات التربيعية. توجد طرق أخرى لحل المعادلات التربيعية مثل التحليل إلى عوامل وإكمال المربع أو الرسم البياني ولكن غالباً ما يكون استخدام الصيغة التربيعية أكثر ملائمة من الطرق الأخرى. الشكل العام للمعادلة التربيعية هو: هنا x يمثل المجهول، بينما a، b، و c هي حدود ثابتة بحيث a لايساوي الصفر. الصيغية التربيعية هي: وما تحت الجذر يسمى المميز. (ar)
  • 二次方程式の解の公式(にじほうていしきのかいのこうしき)とは、未知数が一つの二次方程式の解を、式の係数を代入することにより求めることができる公式である。 (ja)
  • Met behulp van de wortelformule of abc-formule kunnen de oplossingen van een kwadratische of vierkantsvergelijking worden gevonden. De oplossingen worden ook de wortels van de vergelijking genoemd. Het zijn de nulpunten van de betrokken tweedegraadsveelterm. (nl)
  • Στην στοιχειώδη άλγεβρα, ο τετραγωνικός τύπος είναι η λύση της δευτεροβάθμιας εξίσωσης. Υπάρχουν και άλλοι τρόποι για να λυθεί η εξίσωση αντί να χρησιμοποιηθεί ο τετραγωνικός τύπος, όπως είναι η παραγοντοποίηση, η συμπλήρωση τετραγώνου, ή να δώθει με γραφική παράσταση. Η χρήση του τετραγωνικού τύπου είναι συνήθως ο πιο εύχρηστος τρόπος. Η γενική εξίσωση είναι: (el)
  • En algèbre classique, la formule quadratique est la solution de l'équation du second degré. Il y a d'autres façons pour résoudre l'équation du second degré au lieu d'utiliser la formule quadratique, comme la factorisation, la méthode de complétion du carré ou le tracé du graphe. Mais utiliser la formule quadratique est souvent la façon la plus pratique. L'équation du second degré générale est : (fr)
  • In elementary algebra, the quadratic formula is a formula that provides the solution(s) to a quadratic equation. There are other ways of solving a quadratic equation instead of using the quadratic formula, such as factoring (direct factoring, grouping, AC method), completing the square, graphing and others. Given a general quadratic equation of the form with x representing an unknown, with a, b and c representing constants, and with a ≠ 0, the quadratic formula is: where the plus–minus symbol "±" indicates that the quadratic equation has two solutions. Written separately, they become: (en)
  • Dalam aljabar elementer, rumus kuadrat adalah rumus yang memberikan solusi untuk sebuah persamaan kuadrat. Ada cara lain untuk menyelesaikan persamaan kuadrat selain menggunakan rumus kuadrat, seperti faktorisasi (pemfaktoran langsung, pengelompokan, metode AC), , ,dan lain sebagainya. Diberikan persamaan kuadrat umum dalam bentuk dengan mewakili suatu variabel yang tidak diketahui. Variabel , , dan mewakili konstanta dengan , rumus kuadratnya adalah: dimana tanda plus-minus "±" menunjukkan bahwa persamaan kuadrat memiliki dua solusi. Dengan menulisnya secara terpisah, maka diperoleh: dan . (in)
  • Em álgebra, a fórmula quadrática, também conhecida como fórmula de Bhaskara no Brasil, é uma fórmula que fornece a solução de uma equação do 2º grau (ou equação quadrática). Existem outras formas de resolver uma equação quadrática, como fatoração, completamento de quadrados, pelo gráfico da função e outras. Dada uma equação quadrática geral no formato: cujo discriminante é positivo (onde representa um valor desconhecido, , e representam constantes, sendo ), a fórmula quadrática é: (pt)
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