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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
4. Factorizing Expressions
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Exercise 38 Page 114

Rewrite each term as a product of - 4 and some other factor.

- 4(2d-5)

Practice makes perfect
Let's rewrite each term as a product of - 4 and some other factor. To do so, note that that product of two negative numbers gives a positive number. 1{\text{-} 8d &= {\color{#FD9000}{\text{-} 4}} ( 2d) \\[0.5em] 20 &= {\color{#FD9000}{\text{-} 4}} (\text{-} 5) } Now we can use the Distributive Property to factor the expression. Let's go!
- 8d+20
SplitIntoFactors

Split into factors

- 4(2d)+ (- 4)(- 5)
FactorOut

Factor out - 4

- 4[2d+(- 5)]
AddNeg

a+(- b)=a-b

- 4(2d-5)
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arrow_right Try It p.110-111
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arrow_right Self-Assessment for Concept & Skills p.111
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arrow_right Self-Assessment for Problem Solving p.112
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arrow_right Review & Refresh p.113
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arrow_right Concept, Skills, & Problem Solving p.113-114
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