quadratic equation


Definition of quadratic equation

: any equation containing one term in which the unknown is squared and no term in which it is raised to a higher power solve for x in the quadratic equation x2 + 4x + 4 = 0

Examples of quadratic equation in a Sentence

Recent Examples on the Web Christian Hansen for The New York Times The quadratic equation has frustrated math students for millenniums. Jonathan Corum, New York Times, "This Professor’s ‘Amazing’ Trick Makes Quadratic Equations Easier," 5 Feb. 2020 Gauss’s work applied to quadratic equations — those with exponents no higher than the number 2. Quanta Magazine, "Robert Langlands, Mathematical Visionary, Wins the Abel Prize," 20 Mar. 2018 For the last 50 years, reformers have wanted to teach kids to reason mathematically, to think nimbly about topics like quadratic equations that otherwise come off flat. Quanta Magazine, "Meet the New Math, Unlike the Old Math," 5 Oct. 2016 The circle is a quadratic equation, also known as a degree-two equation. Quanta Magazine, "Without a Proof, Mathematicians Wonder How Much Evidence Is Enough," 31 Oct. 2018 The teenager next door named Lisa, played by Justin, has come to get help with the quadratic equation. Kathryn Lindsay, refinery29.com, "R29 Binge Club: Glow Season 2, Episodes 1-10," 29 June 2018 The key is to fit a quadratic equation to the data. Rhett Allain, WIRED, "This Crazy Slide Is Either Evil or Funny," 17 June 2018 The mere fact that a quadratic equation makes a reasonable fit means that the human is accelerating the whole time. Rhett Allain, WIRED, "This Crazy Slide Is Either Evil or Funny," 17 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quadratic equation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of quadratic equation

1647, in the meaning defined above

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Time Traveler for quadratic equation

Time Traveler

The first known use of quadratic equation was in 1647

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Cite this Entry

“Quadratic equation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quadratic%20equation. Accessed 3 Jul. 2020.

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More Definitions for quadratic equation

quadratic equation


English Language Learners Definition of quadratic equation

mathematics : an equation in which the highest unknown variable is multiplied by itself only once

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