### LESSON 7-2 PROBLEM SOLVING FACTORING BY GCF

Factor the common factor, x , out of the first group and the common factor, 4, out of the second group. This method of factoring only works in some cases. Look for common factors between the factored forms of the paired terms. What do you think? Rewrite each term with the GCF as one factor. Make sure that you pay careful attention not only to the process used for factoring, but also to the make-up of the polynomials that can be factored using this method. Properties of Real Numbers.

The fully factored polynomial will be the product of two binomials. The following are webpages that can assist you in the topics that were covered on this page: Factor the common factor 3 x out of first group. Rewrite each term with the GCF as one factor. Group terms into pairs.

Hence our GCF is. That is ok, we treat it in the same manner that we do when we have a monomial GCF. Factor 3 out of the second group. Introduction Factoring is to write an expression as a product of factors.

# Greatest Common Factor

The greatest common factor GCF for a polynomial is the largest monomial that is a factor of divides each term of the polynomial. For example, we can write 10 as 5 2where 5 and 2 are called factors of Note that if we multiply our answer out, we do get the original polynomial. This method of factoring only works in some cases.

Factor out the 5 b 2. The process of breaking a number down into its prime factors is called prime factorization.

## Factoring Polynomials Using the Greatest Common Factor (GCF)

Properties of Real Numbers. You will need to divide monomials in order to factor polynomials. However, what do you do if the terms within the polynomial do not share any common factors? When factoring a four-term polynomial using grouping, find the common factor of pairs of terms rather than the whole polynomial. Divide the GCF factoriing of every term of the polynomial.

Example Problem Find the greatest common factor of and When two or more monomials are combined either added or subtracted leszon, the resulting expression is called a polynomial.

Putting this together we have a GCF of 3 xy. Factor 81 c 3 d. You can then use the distributive property to rewrite the polynomial in a factored form.

## Try Factor a Polynomial by Finding Its Greatest Common Factor

Group the first factorung terms together and then the last two terms together. Example Problem Find the greatest common factor of 81 c 3 d and 45 c 2 d 2. Find the greatest common factor of 81 c 3 d and 45 c 2 d 2. We have to decide which exponent we are going to use.

Something to look forward to! Students Homeschool Adults Teachers. Hopefully you now understand how to factor polynomials if the polynomials have a greatest common factor. This problem looks a little different, because now our GCF is a binomial.

As shown above when we divide 2 x by 2 x we get 1, so vactoring need a 1 as the third term inside of the. So you can factor out a 5 and rewrite the polynomial as a 5 8 a — How to Succeed in a Math Class for some more suggestions. Factor the common factor, xout of the first group and the common factor, 4, out of the second group. You can use some of the same logic that you apply to factoring integers to factoring polynomials.

When factoring 5 b out of 10 ab and 5 bthe remaining 2 a and 1 must still be added and bby by the common factor 5 b: Factor the common factor 7 x out of the first group. Find the GCF ;roblem the list of monomials: Group terms into pairs.