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quadratic formula

American  
[kwo-drat-ik fawr-myuh-luh] / kwɒˈdræt ɪk ˈfɔr mjə lə /

noun

Mathematics.
  1. the formula for determining the roots of a quadratic equation from its coefficients: .


Example Sentences

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Some quadratic equations must be solved by using the quadratic formula.

From Textbooks Dec. 1, 2021

The quadratic formula learned by generations of math students is difficult to remember, but it can be used to solve quadratic equations where y = 0.

From Seattle Times Feb. 10, 2020

Before students are presented with the quadratic formula, they’re taught a simpler method to solve certain equations.

From Seattle Times Feb. 10, 2020

While quadratics can be solved using the relatively simple quadratic formula, the corresponding formulas for cubic and fourth-degree polynomials are not simple enough to remember, and formulas do not exist for general higher-degree polynomials.

From Textbooks Feb. 13, 2015

The quadratic formula has been known for centuries; the ninth-century mathematician al-Khowarizmi knew how to solve almost every quadratic equation, though he didn’t seem to consider negative numbers as roots.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

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