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Elementary Algebra

Lynn Marecek, MaryAnne Anthony-Smith

$Math Studyset Vaia Explanations$ Math

2nd Edition · 1240 pages

ISBN: 9780998625713

Chapter 7: Q 7.2. (page 809)

Find the GCF of 18 and 40.

Short Answer

Expert verified

GCF is 2.

Step by step solution

01

Step 1. Given information.

The given numbers are:
$18 and 40$

02

Step 2. Find the GCF.

Factor each number into primes.

$18 = 2 \cdot 3 \cdot 3 40 = 2 \cdot 2 \cdot 2 \cdot 5$

Bring down the common factors, to get the GCF,

GCF $= 2$

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In the following exercises, factors completely:

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