Factor by GroupingOct. 10 and 13

Bell Ringer

Factor:

1.

2.

Review

Factor the following by taking out the GCF:

Your Turn! Pull out a half sheet of paper and answer the following problems. We will be turning these in.

Factor By Grouping (4 terms)

Step 1: See is there is a GCF in ALL the terms. If there is, then take him out and write on the outside

of brackets. Step 2: Pair up your terms using parenthesis. Step 3: Find the GCF of each pair and factor them out. Step 4: Check that the remaining factors are the same. Step 5: Factor the remaining ones out.

Stick them in their own set of parenthesis, and whatever is remaining in the other set.

Step 6: Check your answer.

Examples:

Factor by the Box Method

Step 1: See is there is a GCF in ALL the terms. If there is, then take him out and write on the

outside of brackets. Step 2: Plug your 4 terms into “the box”. Step 3: Look at each column. Decide what the GCF

is of each and write it on the top. Step 4: Look at each row. Decide what the GCF is of

each and write it on the left. Step 5: Write the factors in parenthesis. Step 6: Check your answer

Examples:

Choose which method you like best and try it out! (on your half sheet of paper)

Homework!

11.

Homework!

18, 19, and 20 are extra credit! They are tricky so be careful!