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: 26

Answer

$-15y^{2}+6y-4$

Work Step by Step

$(-6y^{2}+3y-4)-(9y^{2}-3y)$ First, remove the grouping symbols. To remove the second parentheses, change the sign of every term inside it: $(-6y^{2}+3y-4)-(9y^{2}-3y)=-6y^{2}+3y-4-9y^{2}+3y=...$ Simplify by combining like terms: $...=-(6+9)y^{2}+(3+3)y-4=-15y^{2}+6y-4$
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