GCF

In order to find the GCF you will need to begin by identifying all positive factors of each number.

 * For example, lets find the GCF for the numbers 15 and 30

15 (1, 3, 5, 15)   30 (1, 3, 5, 6, 10, 15, 30)
 * The next step is to find all the numbers that 15 and 30 have in common

15 (1, 3, 5, 15)   30 (1, 3, 5, 15)
 * The GCF is the highest number that both sets of factors have in common

**In this case the GCF is 15** Now lets try factoring out the GCF in this polynomial 3x3 + 27x2 + 9x GCF = 3x 3x > 27x2 / 3x = 9x > 9x / 3x = 3 **3x(x2 + 9x + 3)** []
 * First you need to find the GCFof 3, 27 and 9
 * Now the equation should be set up like this:
 * Next you will need to divide each term from the original expression  3x3 / 3x = x2
 * Now you are left with