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

From Seattle Times Feb. 10, 2020

That’s when students turn to the quadratic formula.

From Seattle Times Feb. 10, 2020

By the quadratic formula, the roots of the characteristic equation are 1 ± 2i.

From Textbooks Mar. 30, 2016

We can use substitution to make the equation appear simpler, and then use the same techniques we use solving an algebraic quadratic: factoring, the quadratic formula, etc.

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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