Answer
(a) No
(b) No
Work Step by Step
(a) No. $a-b=-b+a=-b--a=-(b-a)$
(b) No. Using the Distributive Property we get:
$-2(a-5)=-2a+-2*-5=-2a+10$, which is not $-2a-10$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.2 - Real Numbers - P.2 Exercises - Page 15: 7
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