
344: Factor by Grouping Lesson
Presentation
•
Mathematics
•
9th Grade
•
Medium
Molly McKee
Used 9+ times
FREE Resource
9 Slides • 5 Questions
1
Unit 9 Day 3 - Factor by Grouping
I can factor a polynomial with 4 terms by grouping.
2
Factoring by Grouping
You know you should factor by grouping if you have 4 terms that cannot be combind
Your first step should ALWAYS be to factor out the GCF of the polynomial
3
Example 1 4n3+8n2−5n−10
Check for GCF
Draw a box
Find the GCF of each column and each row
Check your answer by multiplying the rows and the columns.
Write your final answer as a product of two binomials.
4
Example 2 9c3−12c2+18c−24
Check for GCF
Draw a box
Find the GCF of each column and each row
Check your answer by multiplying the rows and the columns.
Write your final answer as a product of two binomials.
5
Multiple Choice
7r3−8r2+42r−48
(r2+6)(7r+8)
(r2+6)(7r−8)
(r2+6)(r2+8)
(r2+6)(7r+6)
6
7
Multiple Choice
5n3−10n2+3n−6
(5n2+3)(n−2)
(5n2−3)(n−2)
(5n3+3)(n−2)
10n(n2−6)
8
9
Multiple Choice
4p3+8p2+3p+6
(2p2+3)(p+2)
(2p2+6)(p+4)
(4p2+3)(p+2)
(4p2+8p)(3p+6)
10
11
Multiple Choice
20x3−25x2+4x−5
(5x2−5)(4x+1)
5(x2−1)(4x+5)
(5x2+1)(4x−5)
(5x2+1)(4x−1)
12
13
Multiple Choice
30x3+15x2−18x−9
(5x2−3)(6x+1)
(5x2−3)(6x+3)
3(5x2+3)(2x−1)
3(5x2−3)(2x+1)
14
Unit 9 Day 3 - Factor by Grouping
I can factor a polynomial with 4 terms by grouping.
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