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: 90

Answer

a. 2x b. x² c. -2x d. x²

Work Step by Step

a. When adding like terms you add the coefficients $1+1=2$. b. When multiplying monomials you multiply the coefficients and the variables, then you multiply those two products $1\times1=1$ & $(x)\times(x)=x²$. c. Same as a. $-1+-1=-2$ d. Same as b. $-1\times-1=1$ & $(x)\times(x)=x²$
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