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# Algebra Vocabulary 1

### Quick Start Vocab

Variables symbols, usually letters, used to represent unknown quantities.
Algebraic Expressions expressions that contain at least one variable
Monomial an algebraic expression that is a number, a variable, or the product of a number and one or more variables.(5,3x,3x2y2,8x2y3)
Monomials Cannot Contain..... variables in the denominator 1/n2(squared) variables with exponents that are negative a-1(-1 is "a" multiplied by "-a") and variables under radicals.
Terms The monomials that make up a polynomial
Polynomial monomial or a sum of monomials
Binomial a polynomial that has 2 unlike terms
Trinomial a polynomial that has 3 unlike terms
Constants monomials that contain no variables. Ex. 24 or -6
Coefficient the numerical factor of a monomial Ex. the 4 in 4m
Degree of a Monomial the sum of the exponents of its variables Ex. the degree of 9m3n4 is 7 (3+4=7 *the degree of a constant is 0.
Power expression of the form xn (n is the power) (power is also used to refer to the exponent itself).
Real Numbers all numbers used in everyday life; the set of all rational and irrational numbers.
Rational Numbers Any number m/n ("m" over "n"), where "m" and "n"are integers and n is not a zero. The decimal form is either a terminating or repeating decimal.
Irrational a real number that is not rational. The decimal form niether terminates nor repeats.
Created by: Mollydog