Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - 5.1 - Addition and Subtraction of Polynomials - Problem Set 5.1: 73

Answer

-5n + 7

Work Step by Step

We write an expression to express this problem: (-8n + 9) - [(-2n - 5) + (-n + 7)] = Remove round brackets. -8n + 9 - [-2n - 5 -n + 7] = Use the distributive property: -8n + 9 + 2n + 5 + n - 7 = Group similar terms. (-8n + 2n + n) + (9 + 5 - 7) = Simplify. -5n + 7
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