Answer
$3.7y^4 - 0.7y^3 + 2.2y - 4$
Work Step by Step
$(7.9y^4 - 6.8y^3 + 3.3y)+(6.1y^3 - 5)-(4.2y^4 + 1.1y - 1)$
$=7.9y^4 - 6.8y^3 + 3.3y+6.1y^3 - 5-4.2y^4 - 1.1y + 1$
$=3.7y^4 - 0.7y^3 + 2.2y - 4$
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 373: 72
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