# Chapter Nine

### 12 terms by amolzahn

#### Study  only

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### factors

numbers that divide evenly into other numbers

### prime numbers

whole numbers greater than 1 whose only factors are 1 and the number itself

### composite numbers

whole numbers greater than 1 that have more than 2 factors

### prime factorization

expressing a whole number as the product of its prime factors

### prime factors

factors that are prime numbers

### GCF

the greatest number that is a factor of 2 or more different numbers

### factor by grouping

the use of the distributive property to factor some polynomials that have four or more terms

### perfect square trinomials

trinomials that are the square of a binomial

### prime binomial

a polynomial that cannot be written as a product of two polynomials with integral coefficients

### conjugate binomials

Binomials that are the same except for the sign between the terms

### perfect square trinomial qualities

the first and third term are perfect squares and positive

### perfect square trinomial equations

do not have to be set to 0

Example: