# quadratic

[kwo-drat-ik]

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- a quadratic polynomial or equation.

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## Origin of quadratic^{}

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for quadratic

### Contemporary Examples

#### “When I was in third grade, I was in quadratic equations when my class was, like, reading clocks,” Andraka says.

Sundance Offers Brief Documentary Films as Part of Focus Forward ProjectKevin Fallon

January 24, 2013

#### As a teen, Randy had painted a submarine, an elevator door and the quadratic equation on the walls of his childhood bedroom.

### Historical Examples

#### It is right, but too lengthy to be worth as much as a Quadratic.

A Tangled TaleLewis Carroll

#### It had never been determined if that order was quadratic, cubic or higher.

Cube Root of ConquestRoger Phillips Graham

#### What does matter is thisI must ask you to tell me exactly why you wished me to work out that quadratic problem for you.

Marjorie Dean, High School JuniorPauline Lester

#### She now began to read Euclids Elements, and proceeded in algebra as far as quadratic equations.

The Book of CuriositiesI. Platts

#### Since the fraction is infinite it cannot be commensurable and therefore its value is a quadratic surd number.

## quadratic

- Also called: quadratic equation an equation containing one or more terms in which the variable is raised to the power of two, but no terms in which it is raised to a higher power

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- of or relating to the second power

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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History for quadratic

### adj.

1650s, "square," with -ic + obsolete quadrate "a square; a group of four things" (late 14c.), from Latin quadratum, noun use of neuter adjective quadratus "square, squared," past participle of quadrare "to square, set in order, complete" (see quadrant). Quadratic equations (1660s) so called because they involve the square of x.

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Online Etymology Dictionary, © 2010 Douglas Harper

## quadratic

[kwŏ-drăt′ĭk]

- Relating to a mathematical expression containing a term of the second degree, such as x2 + 2.♦ A quadratic equation is an equation having the general form ax2 + bx + c = 0, where a, b, and c are constants.♦ The quadratic formula is x = -b ± √(b2 - 4ac)/2a. It is used in algebra to calculate the roots of quadratic equations.

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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.