quadratic equation

noun

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, 5 Feb. 2020 Gauss’s work applied to quadratic equations — those with exponents no higher than the number 2. Quanta Magazine, 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, 5 Oct. 2016 The circle is a quadratic equation, also known as a degree-two equation. Quanta Magazine, 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, 29 June 2018 The key is to fit a quadratic equation to the data. Rhett Allain, WIRED, 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, 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.

See More

First Known Use of quadratic equation

1647, in the meaning defined above

Keep scrolling for more

Learn More About quadratic equation

Time Traveler for quadratic equation

Time Traveler

The first known use of quadratic equation was in 1647

See more words from the same year

Statistics for quadratic equation

Cite this Entry

“Quadratic equation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quadratic%20equation. Accessed 22 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for quadratic equation

quadratic equation

noun

English Language Learners Definition of quadratic equation

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

WORD OF THE DAY

Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!