Elementary Algebra

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

Chapter 2 - Real Numbers - Chapters 1-2 Cumulative Review Problem Set: 25

Answer

$14$

Work Step by Step

First, we express each number as a product of its prime factors: $42=2\times3\times7$ $70=2\times5\times7$ Since one 2 and one 7 are common to both the numbers: Greatest Common Factor$=2\times7=14$
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