College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.1 - Page 20: 154


false; $-x-x=-2x$

Work Step by Step

Start by checking if there are two identities for the equations, and then simplify the expression. $-x-x=-x+(-x)=0$ $-x-x=-x-x=0$ $-x-x=-x-x$ $-x-x=-2x$ The first two expressions are identical, while the last one is different, making the statement false.
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