How to Factor the Sum of Two Perfect Cubes
Identifying Prime Numbers
How to Reduce Fractions Using Prime Factorization

How to Group Six Terms for Factoring

You can group terms for factoring in expressions where the terms don't share a common factor or common variable. When grouping six terms for factoring, there’s the chance that the groups can be two groups of three terms or three groups of two terms each.

Dividing terms into two groups of three

Factor this expression by dividing the terms into two groups of three:

image0.png
  1. Look for the common factor in each group.

    The first three terms have a common factor of a, and the second three terms have a common factor of b.

    image1.png
  2. Factor.

    image2.png
  3. Factor the quadratic using the unFOIL method.

    The first factor is a quadratic.

    image3.png

Dividing terms into three groups of two

Grouping the terms two at a time (into three groups) is another way to work the same problem:

image4.png
  1. Rearrange the terms, putting the xsquared variables, the x variables, and the numbers together.

    You end up with:

    image5.png
  2. Look for the common factor in each group, and factor.

    image6.png
  3. Factor.

    You have three terms, each with a factor of (a + b). Take the (a + b) out of each term to get:

    image7.png
blog comments powered by Disqus
How to Factor Out Variables
How to Factor Out Numbers
Digging Up Polynomial Roots with Factoring
How to Simplify Factorial Expressions
Factoring in Algebra I
Advertisement

Inside Dummies.com