Answer
9x$^2$y-4xy-2y$^2$+8
Work Step by Step
(4x$^2$y+3xy-2y$^2$)+(5x$^2$y-7xy+8)
=4x$^2$y+3xy-2y$^2$+5x$^2$y-7xy+8
=9x$^2$y-4xy-2y$^2$+8
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 3 - Exponents, Polynomials and Functions - Chapter Test - Page 289: 14
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