Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.4 - Adding and Subtracting Polynomials - Exercise Set: 28

Answer

$-0.8y^{2}+0.6y-0.6$

Work Step by Step

$(-0.3y^{2}+0.6y-0.3)-(0.5y^{2}+0.3)$ Remove both parentheses. To remove the second one, change the sign of every term inside it: $-0.3y^{2}+0.6y-0.3-0.5y^{2}-0.3=...$ Simplify by combining like terms: $...=-(0.3+0.5)y^{2}+0.6y-(0.3+0.3)=-0.8y^{2}+0.6y-0.6$
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