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# Algebra

TermDefinition
Term A number, a variable, or a product of numbers and variables.
Variable A symbol, typically a lower case letter, that is used to represent an unspecified number.
Algebriac Expression An expression consisting of one or more numbers and variables along with one or more arithmetic operations.
Equation A mathematical sentence that compares two expressions linked by an equals sign (=).
Inequality A mathematical sentence comparing two expressions that are linked by one of the following: <, <, >, or >.
Real Numbers The set of rational numbers and irrational numbers together form the set of real numbers.
Natural Numbers The set of counting numbers expressed as {1,2,3,...}.
Intigers The set of numbers represented as {..., -3,-2, -1, 0, 1, 2, 3,...}.
Rational Number A number that can be expressed as a ratio of two integers, except that the denominator cannot be equal to zero.
Irrational Number A number that cannot be expressed in the form (a/b) where a and b are integers and b <> 0.
Coefficiant The numerical factor in a term. In the term 4x, 4 is the coefficient.
Constant A monomial term that lacks a variable component.
Arithmetic Operation A mathematical process of addition, subtraction, multiplication or division.
Exponent In an expression of the form x^n, the exponent is n. The exponent represents the number of times the base is multiplied by itself.
Polynomial A monomial or a sum of monomials.
Binomial The sum of two monomials.
Trinomial The sum of three monomials, assuming that like terms have been combined.
Monomial A number, a variable, or a product of a number and one or more variables.
Like Terms Terms that contain the same variables.
Absolute Value The distance the number is from the zero point on the number line.