Do Now Take out your Homework and Green

Do Now: �Take out your Homework and Green sheet �Factor the following: 1. x 2 + 12 x +20 2. 6 x 2 – 7 x + 18 3. x 2 – 25

Homework

What do you notice about this expression? ? 9 a 2 – 16

When we see an expression like this: 9 a 2 – 16 �Look for a GCF to pull out of all the terms in the expression �Automatically write parentheses with a plus and )(3 a -4 ) minus. ( 3 a +4 �Take the square root of the first term, and write it in the first spot in the parentheses. �Take the square root of the second term and write it in the second spot in the parentheses.

4 y 2 – 36 25 a 2 – 49 b 2

9 y 4 – 1 49 v 4 – 121 b 2

Factoring Word Problems #4 The area of a rectangular computer screen is 4 x 2 + 20 x + 16. The width of the screen is 2 x + 8. What is the length of the screen? 2 x + 2

Factoring Word Problems #5 The area of a rectangular granite countertop is 12 x 2 + 10 x – 12. The width of the countertop is 2 x + 3. What is the length of the countertop? 6 x - 4

Factoring Word Problems #6 Find the missing side if the area is 6 x 2 + 33 x + 42. 3 x Ø 2 x + 7 6

Factoring Word Problems #7 �When 2 r 2 + 33 r – 54 and r 2 + 18 r are factored, a common factor is what? Ø (r + 18)

Partner White Boards! �Rules of White Boards: �Do not color with the white board markers �It dries the markers out and we cannot use the white boards if this happens �Show me an answer when you are done and I will tell you yes: correct, close: can you find your mistake? Or no: fix it �No Participation means No Whiteboard For You!!!!

Prizes!! �I’m keeping count of how many questions you are getting right. �There is a small prize for the people who get above 85%

Factor the following x 2 + 15 x + 56 x 2 – 14 x + 48

36 x 2 – 4 y 2 5 x 2 – 50 x + 80

2 x 3 – 2 x 2 – 4 x 4 x 3 – 64 x

3 x 2 + 4 x – 4 6 x 2 – 11 x – 7

12 x 2 – 11 x + 2 10 x 2 + 19 x + 6

Who gets a prize? !

One Last Thing… Hand in the One Last Thing into the basket. Homework: • Factor a 2 – b 2 • #1 -20 evens