In elementary algebra, a binomial is a polynomial with two terms: the sum of two monomials. It is the simplest kind of polynomial except for a monomial.

The binomial a^2 - b^2 can be factored as the product of two other binomials:: a^2 - b^2 = (a + b)(a - b). (This is a special case of the more general formula a^{n+1} - b^{n+1} = (a - b)sum_{k=0}^{n} a^{k},b^{n-k}.)

The product of a pair of linear binomials "a x + b" and "c x + d" is:: (a x + b)(c x + d) = a c x^2 + (a d + b c) x + b d.

A binomial raised to the "nth" power, represented as: (a + b)^n can be expanded by means of the binomial theorem or, equivalently, using Pascal's triangle.


A simple but interesting application of the cited binomial formula is the "(m,n)-formula" for generating Pythagorean triples: for "m < n", let a=n^2-m^2, b=2mn, c=n^2+m^2, then a^2+b^2=c^2.

See also

*Completing the square
*Binomial distribution
*Binomial coefficient
* Binomial-QMF (Daubechies Wavelet Filters)
*The list of factorial and binomial topics contains a large number of related links.

External links

* [ Binomial] All Math Words Encyclopedia for grades 7-10.

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  • binomial — binomial, iale, iaux [ binɔmjal, jo ] adj. • mil. XVe; de binôme ♦ Math. Relatif au binôme. Coefficient binomial : coefficient de la formule du binôme de Newton. Loi binomiale : loi de statistique d un phénomène à deux événements complémentaires… …   Encyclopédie Universelle

  • Binomial — Bi*no mi*al, a. 1. Consisting of two terms; pertaining to binomials; as, a binomial root. [1913 Webster] 2. (Nat. Hist.) Having two names; used of the system by which every animal and plant receives two names, the one indicating the genus, the… …   The Collaborative International Dictionary of English

  • Binomial — Bi*no mi*al, n. [L. bis twice + nomen name: cf. F. binome, LL. binomius (or fr. bi + Gr. ? distribution ?). Cf. {Monomial}.] (Alg.) An expression consisting of two terms connected by the sign plus (+) or minus ( ); as, a + b, or 7 3. [1913… …   The Collaborative International Dictionary of English

  • binomial — Que contiene dos nombres o términos. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • binomial — distribution …   Dictionary of sociology

  • Binomial — distribution …   Dictionary of sociology

  • binomial — 1550s (n.); 1560s (adj.), from L.L. binomius having two personal names, a hybrid from bi (see BI (Cf. bi )) + nomius, from nomen (see NAME (Cf. name)). Taken up 16c. in the algebraic sense consisting of two terms …   Etymology dictionary

  • binomial — ► NOUN 1) Mathematics an algebraic expression of the sum or the difference of two terms. 2) Biology the two part Latin name of a species (the genus followed by the species name). ► ADJECTIVE ▪ consisting of two terms. ORIGIN from Latin bi having… …   English terms dictionary

  • binomial — [bī nō′mē əl] n. [< ModL binomium < LL binomius < L bi , BI 1 + Gr nomos, law (see NOMY) + AL] 1. a mathematical expression consisting of two terms connected by a plus or minus sign 2. a two word scientific name of a plant or animal,… …   English World dictionary

  • binomial — n. & adj. n. 1 an algebraic expression of the sum or the difference of two terms. 2 a two part name, esp. in taxonomy. adj. consisting of two terms. Phrases and idioms: binomial classification a system of classification using two terms, the first …   Useful english dictionary

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