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: 88

Answer

$a. 3y$ $b. 2y²$ $c. -3y$ $d. 2y²$

Work Step by Step

a. When adding like terms you add the coefficients $2+1=3$. b. When multiplying monomials you multiply the coefficients and the variables, then you multiply those two products $2\times1=2$ & $(y)\times(y)=y²$. c. Same as a. $-2+-1=-3$ d. Same as b. $-2\times-1=2$ & $(y)\times(y)=y²$
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