Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Section 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 42


$-13x^2 -8y^2 +5x $

Work Step by Step

We simplify by removing the parentheses and then add the like terms as follows: $$ (-13x^2 - 3y^2 - 4y) - (-5x - 4y + 5y^2)\\ =-13x^2 - 3y^2 - 4y +5x + 4y - 5y^2\\ =-13x^2 -8y^2 +5x .$$
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