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factor 21x3-7x2+15x-5

factor 21x3-7x2+15x-5

Elementary Algebra
Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter7: Factoring
Section7.1: Greatest Common Factor And Factor By Grouping
Problem 7.24TI: Factor: 9y27 .
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factor 21x3-7x2+15x-5

Expert Solution
Step 1

By hit and trial method:

at x = 13

Algebra homework question answer, step 1, image 1

Therefore, x = 13 is root.

and x-13 is a factor. 

Step 2

Use the long division method to find the other factors :

Algebra homework question answer, step 2, image 1

Therefore,

Algebra homework question answer, step 2, image 2

 

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