In elementary algebra, a **trinomial** is a polynomial consisting of three terms or monomials.^{ [1] }

- with variables
- with variables
- with variables
- with variables, nonnegative integers and any constants.
- where is variable and constants are nonnegative integers and any constants.

A trinomial equation is a polynomial equation involving three terms. An example is the equation studied by Johann Heinrich Lambert in the 18th century.^{ [2] }

- sum or difference of two cubes:

- A special type of trinomial can be factored in a manner similar to quadratics since it can be viewed as a quadratic in a new variable (
*x*^{n}below). This form is factored as:

where

For example, the polynomial (*x*^{2} + 3*x* + 2) is an example of this type of trinomial with *n* = 1. The solution *a*_{1} = 2 and *a*_{2} = 1 of the above system gives the trinomial factoring:

- (
*x*^{2}+ 3*x*+ 2) = (*x*+*a*_{1})(*x*+*a*_{2}) = (*x*+ 2)(*x*+ 1).

The same result can be provided by Ruffini's rule, but with a more complex and time-consuming process.

In mathematics, a **Diophantine equation** is a polynomial equation, usually involving two or more unknowns, such that the only solutions of interest are the integer ones. A **linear Diophantine equation** equates to a constant the sum of two or more monomials, each of degree one. An **exponential Diophantine equation** is one in which unknowns can appear in exponents.

In mathematics, an **equation** is a statement that asserts the equality of two expressions, which are connected by the equals sign "=". The word *equation* and its cognates in other languages may have subtly different meanings; for example, in French an *équation* is defined as containing one or more variables, while in English, any equality is an equation.

In mathematics, a **polynomial** is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponentiation of variables. An example of a polynomial of a single indeterminate *x* is *x*^{2} − 4*x* + 7. An example in three variables is *x*^{3} + 2*xyz*^{2} − *yz* + 1.

In mathematics, the **discriminant** of a polynomial is a quantity that depends on the coefficients and determines various properties of the roots. It is generally defined as a polynomial function of the coefficients of the original polynomial. The discriminant is widely used in polynomial factoring, number theory, and algebraic geometry. It is often denoted by the symbol .

In mathematics, **factorization** or **factoring** consists of writing a number or another mathematical object as a product of several *factors*, usually smaller or simpler objects of the same kind. For example, 3 × 5 is a factorization of the integer 15, and (*x* – 2)(*x* + 2) is a factorization of the polynomial *x*^{2} – 4.

In algebraic number theory, an **algebraic integer** is a complex number which is integral over the integers. That is, an algebraic integer is a complex root of some monic polynomial whose coefficients are integers. The set of all algebraic integers is closed under addition, subtraction and multiplication and therefore is a commutative subring of the complex numbers.

In mathematics, an **irreducible polynomial** is, roughly speaking, a polynomial that cannot be factored into the product of two non-constant polynomials. The property of irreducibility depends on the nature of the coefficients that are accepted for the possible factors, that is, the field or ring to which the coefficients of the polynomial and its possible factors are supposed to belong. For example, the polynomial *x*^{2} − 2 is a polynomial with integer coefficients, but, as every integer is also a real number, it is also a polynomial with real coefficients. It is irreducible if it is considered as a polynomial with integer coefficients, but it factors as if it is considered as a polynomial with real coefficients. One says that the polynomial *x*^{2} − 2 is irreducible over the integers but not over the reals.

In mathematics, a **quadratic form** is a polynomial with terms all of degree two. For example,

In mathematics, an **affine algebraic plane curve** is the zero set of a polynomial in two variables. A **projective algebraic plane curve** is the zero set in a projective plane of a homogeneous polynomial in three variables. An affine algebraic plane curve can be completed in a projective algebraic plane curve by homogenizing its defining polynomial. Conversely, a projective algebraic plane curve of homogeneous equation *h*(*x*, *y*, *t*) = 0 can be restricted to the affine algebraic plane curve of equation *h*(*x*, *y*, 1) = 0. These two operations are each inverse to the other; therefore, the phrase **algebraic plane curve** is often used without specifying explicitly whether it is the affine or the projective case that is considered.

In algebra, a **monic polynomial** is a single-variable polynomial in which the leading coefficient is equal to 1. Therefore, a monic polynomial has the form:

In mathematics, and more specifically in computer algebra, computational algebraic geometry, and computational commutative algebra, a **Gröbner basis** is a particular kind of generating set of an ideal in a polynomial ring *K*[*x*_{1}, …, *x*_{n}] over a field *K*. A Gröbner basis allows many important properties of the ideal and the associated algebraic variety to be deduced easily, such as the dimension and the number of zeros when it is finite. Gröbner basis computation is one of the main practical tools for solving systems of polynomial equations and computing the images of algebraic varieties under projections or rational maps.

In mathematics, a **monomial** is, roughly speaking, a polynomial which has only one term. Two definitions of a monomial may be encountered:

- A monomial, also called
**power product**, is a product of powers of variables with nonnegative integer exponents, or, in other words, a product of variables, possibly with repetitions. For example, is a monomial. The constant is a monomial, being equal to the empty product and to for any variable . If only a single variable is considered, this means that a monomial is either or a power of , with a positive integer. If several variables are considered, say, then each can be given an exponent, so that any monomial is of the form with non-negative integers. - A monomial is a monomial in the first sense multiplied by a nonzero constant, called the coefficient of the monomial. A monomial in the first sense is a special case of a monomial in the second sense, where the coefficient is . For example, in this interpretation and are monomials.

In mathematics, especially in the field of algebra, a **polynomial ring** or **polynomial algebra** is a ring formed from the set of polynomials in one or more indeterminates with coefficients in another ring, often a field.

In mathematics, an **algebraic equation** or **polynomial equation** is an equation of the form

In number theory, a **formula for primes** is a formula generating the prime numbers, exactly and without exception. No such formula which is efficiently computable is known. A number of constraints are known, showing what such a "formula" can and cannot be.

In algebra, a **binomial** is a polynomial that is the sum of two terms, each of which is a monomial. It is the simplest kind of sparse polynomial after the monomials.

In mathematics, the **lexicographic** or **lexicographical order** is a generalization of the alphabetical order of the dictionaries to sequences of ordered symbols or, more generally, of elements of a totally ordered set.

In mathematics, a **variable** is a symbol and placeholder for an expression or a quantity that varies as an arbitrary or indeterminate object. It may represent, non-comprehensively, a number, vector, matrix, function, argument of a function, set, or element of a set.

In mathematics, an **algebraic expression** is an expression built up from integer constants, variables, and the algebraic operations. For example, 3*x*^{2} − 2*xy* + *c* is an algebraic expression. Since taking the square root is the same as raising to the power 1/2, the following is also an algebraic expression:

In mathematics, the **degree** of a polynomial is the highest of the degrees of the polynomial's monomials with non-zero coefficients. The degree of a term is the sum of the exponents of the variables that appear in it, and thus is a non-negative integer. For a univariate polynomial, the degree of the polynomial is simply the highest exponent occurring in the polynomial. The term **order** has been used as a synonym of *degree* but, nowadays, may refer to several other concepts.

- ↑ "Definition of Trinomial".
*Math Is Fun*. Retrieved 16 April 2016. - ↑ Corless, R. M.; Gonnet, G. H.; Hare, D. E. G.; Jerey, D. J.; Knuth, D. E. (1996). "On the Lambert
*W*Function" (PDF).*Advances in Computational Mathematics*.**5**(1): 329–359. doi:10.1007/BF02124750.

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