1. Writing Sums AS PRODUCTS & PRODUCTS as Sums
Engage NY- LESSON 4

2. Rewrite the expressions as a product of two factors.
What can you factor out of both 72 & 8?
8 (9t + 1)
72t + 8 = 8 (9t + 1)
What does 8 represent?
Greatest Common Factor

3. Write each sum as a product of two factors
Example 3:
a) 2 ● ● 3 =
3 (2 + 5)
b) (2 + 5) + (2 + 5) + (2 + 5) =
How many (2+5) are there? 3

4. Write each sum as a product of two factors
For some problems, it is just easier to solve and then factor out.
2x + (5 + x ) + 5 ● 2
(2x + x) (5 ● 2)
3x =
3x + 15
What can you factor out?
GCF?
3(x + 5)

5. Write each sum as a product of two factors
2x + (y + x ) + 2y
(2x + x) + (y + 2y)
3x + 3y
What can you factor out?
GCF?
3(x + y)

6. Expand each expression & collect like terms
Page 16- Example 6- l
-a – (a – b)
-a – 1 (a – b) Distributive Property
(– a – a ) + b Associative Property
–2a + b Combine Like Terms