Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 5 - Section 5.4 - Polynomials in Several Variables - Exercise Set - Page 375: 16



Work Step by Step

Removing the grouping symbols and then combining like terms, the given expression, $ (x^4-7xy-5y^3)-(6x^4-3xy+4y^3) ,$ simplifies to \begin{array}{l}\require{cancel} x^4-7xy-5y^3-6x^4+3xy-4y^3 \\\\= (x^4-6x^4)+(-7xy+3xy)+(-5y^3-4y^3) \\\\= -5x^4-4xy-9y^3 .\end{array}
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