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: 71

Answer

$-6.6x^2-1.8x-1.8$

Work Step by Step

$(1.2x^2 -3x+9.1)-(7.8x^2 -3.1+8)+(1.2x-6)$ $=1.2x^2 -3x+9.1-7.8x^2 +3.1-8+1.2x-6$ $=1.2x^2 -3x+9.1-7.8x^2 +3.1-8+1.2x-6$ $=-6.6x^2-1.8x-1.8$
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