When you are given an algebraic expression of 4 or more terms on the GED math test, you should factor by first grouping the terms into two identical sets of parentheses. Whatever is outside the parentheses will be combined to form the second parentheses to form the final answer.
3n² + 6n + 5n + 10n
First group into two sets of parentheses.
(3n² + 6n) + (5n + 10n)
Then figure out what you need to take out of both sets of parentheses in order to have two identical sets of parentheses. It looks like if you divide the first set by 3n you’ll get (n + 2) and if you divide the second set by 5 you’ll also get (n + 2).