1. Warm up (12x2 + 8x – 6) – (9x2 – 2x + 5) Find the area and perimeter

2. Questions over hw?

3. GCF What does it stand for? What is it?

4. What is the greatest common factor??36
1, 2, 3, 4, 6, 9, 12, 18, 36 24
1, 2, 3, 4, 6, 8, 12, 24
The number 12

5. What is the greatest common factor??35
1, 5, 7
The number 5

6. What is the greatest common factor??3y
1, y
-8xy
1, 2, 4, 8 x y y

7. What is the greatest common factor??
22x2
1, 2, 11, xx
-11x
-1, x
11x

8. What is the greatest common factor??
-4x6
-x4
-2x2
-1, 2, xxxxxx
-1 xxxx
-1, 2 xx
-x2

9. What is the greatest common factor??
8x3y5
-20x5y3
12x7y6
1, 2, 4, xxx yyyyy
-1, 2, 4, 5, 10, xxxxx yyy
1, 2, 3, 4, 6, 12 xxxxxxx yyyyyy
4x3y3

10. What is the greatest common factor??x5 2 y
xxxxx
1, 2 y
PRIME

11. Factoring means to write as a product
Always look for a Greatest Common Factor 1st.
Factor 4x + 6y
What is their greatest common factor?
= 2( ) 2x
+ 3y
Now, DIVIDE each term by the GCF.

12. Now, DIVIDE each term by the GCF.
Factor
8a3 + 4a2 + 12a
What is their GCF?
= 4a( )
2a2
+ a
+ 3
Now, DIVIDE each term by the GCF.
40x2 – 100xy – 80y2
= 20( )
2x2
– 5xy
– 4y2

13. Now, DIVIDE each term by the GCF.
Factor
2h2k + 2k
What is their GCF?
= 2k( ) h2
+ 1
Now, DIVIDE each term by the GCF.
12x5y2 + 9x4y2 - 6x3y2
= 3x3y2( )
4x2
+ 3x
– 2

14. CW/HW GCF Practice