Whoops! Something went wrong.

Click here to refresh the page

Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)

Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Factoring Lesson 4: Factoring trinomials when a = 1 (AC Method)
Grade Levels
Resource Type
Product Rating
4.0
2 ratings
File Type

Word Document File

Be sure that you have an application to open this file type before downloading and/or purchasing.

2 MB|4 pages
Product Description
Factoring trinomials whose leading coefficient (a) is 1. Notes included.

I do not teach the "guess and check" method of factoring; students struggle with it because there is no process. The "AC method" uses a process/algorithm to easily factor a trinomial; it relies on the concept of factoring by grouping.

1. Multiply a and c
2. Find factors of "ac" that add up to "b"
3. Rewrite "bx" using the factors you found
4. Factor by grouping

Because of this method, the only "new" thing between this lesson and the previous one does not seem as daunting as it would by using guess and check - the students need only find the factors that add up to b and rewrite bx using those factors. Then, they factor by grouping, and will usually pick up pretty quickly that that step is like the previous lesson.

Once they know the general process, factoring is simple, especially when a > 1 (Lesson 6).

I also show the students a chart (in example #6) that is helpful in determining the signs, it really becomes "fool proof". When the signs need to be different, I tell the students that "the larger factor takes the sign of the middle term" and make sure to use that phrase repeatedly. It really takes all the "guessing" - and thus the anxiety - out of factoring.
Total Pages
4 pages
Answer Key
Included
Teaching Duration
40 minutes
Report Copyright Infringement
  • Comments & Ratings
  • Product Q & A
Loading...
$1.87
Digital Download
Add one to cart

Advertisement

Advertisement

$1.87
Digital Download
Add one to cart
Teachers Pay Teachers

Teachers Pay Teachers is an online marketplace where teachers buy and sell original educational materials.

Learn More

Keep in Touch!

Sign up