Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Review: 80

Answer

$-2x^2-x+20$

Work Step by Step

$(x^2+7x+9)+(x^2+4)-(4x^2+8x-7)$ $=x^2+7x+9+x^2+4-4x^2-8x+7$ $=x^2+x^2-4x^2+7x-8x+9+4+7$ $=-2x^2-x+20$
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