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

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.

See More

First Known Use of quadratic equation

1647, in the meaning defined above

Keep scrolling for more

Learn More about quadratic equation

Share quadratic equation

Statistics for quadratic equation

Look-up Popularity

Time Traveler for quadratic equation

The first known use of quadratic equation was in 1647

See more words from the same year

Comments on quadratic equation

What made you want to look up quadratic equation? Please tell us where you read or heard it (including the quote, if possible).


living or existing for a long time

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
True or False

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


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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