Answer
$9y^7+3y^7=12y^7$
Work Step by Step
Both terms are combined into one term, this implies that the exponent on the variable is the same. Therefore,
$9y^7+3y^7=12y^7$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.4 - Adding and Subtracting Polynomials - Exercise Set - Page 374: 80
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