Warm Up
Put the expression in expanded form using the distributive property.
2. 2(4x + 5)
1. 3(x + ­8)
3. (2x ­ 9)3
4. 5y(3x ­ 4)
Put the expression in factored form using the distributive property.
5. 3x + 15
6. 14x2 ­ 21x
1
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Equivalent Expressions
Voc
a
Boo b k
Mathematical phrases 2k + 6 = 2(K + 3)
that give the same results for every value of a variable.
3r + 2 = 2 + 3r
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Work in small groups to complete #1-8
multiply then add:
add then multiply:
2
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3
Investigation 1.3.2
Did we meet our objectives?
Content Objective: WWBAT see that there are two different ways to write an expression. Language Objective: WWBAT explain why a situation is represented by an expression.
Assignments 1.3B page 63 mild/spicy#4a, 5­9, & 29
Due______________
4
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Voc
a
Boo b k
Expand (Expanded Form)
The removing of 8(2x + 4) =8 2x + 8 4
parentheses when using = 16x + 32
the distributive property.
expanded form
distributing papers
passing out Halloween candy
Factor (Factored Form)
Voc
a
Boo b k
factoring 6 is 6 = 2(3)
The putting in of parentheses when
factoring 5x + 10 is
using the distributive 5x + 10 =5(1x + 2)
property.
factored form
everyone returning the
same thing
Recall
Factors ­2 numbers that are multiplied
5
6
7
8