Answer
$(a+b)+c=a+(b+c)$
$(ab)c=a(bc)$
Work Step by Step
For addition and multiplication, changing grouping does not affect the answer.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.1 - Algebraic Expressions, Mathematical Models, and Real Numbers - Concept and Vocabulary Check - Page 16: 14
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