Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - 4.4 Addition and Subtraction of Polynomials - 4.4 Exercise Set: 21

Answer

$2x^6+9x^4+2x^3-4x^2+5x$

Work Step by Step

By combining like terms, the given expression, $ (3x^6+2x^4-x^3+5x)+(-x^6+3x^3-4x^2+7x^4) $, simplifies to \begin{array}{l} (3x^6-x^6)+(2x^4+7x^4)+(-x^3+3x^3)-4x^2+5x \\\\= 2x^6+9x^4+2x^3-4x^2+5x .\end{array}
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