Answer
$2k-2m$
Work Step by Step
We can directly remove the first set of parenthesis. But, to remove the second set of parenthesis, we need to distribute -1 to both terms, $m$ and $-k$. $(k-m)-(m-k)=k-m-m+k=2k-2m$.
Algebra 2 Common Core
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133186024
ISBN 13:
978-0-13318-602-4
Chapter 1 - Expressions, Equations, and Inequalities - 1-3 Algebraic Expressions - Practice and Problem-Solving Exercises - Page 24: 74
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