Question #99e5b

1 Answer
EZ as pi
Feb 8, 2017

GCF = 4 and LCM = 180xy

Explanation:

Write each as the product of its prime factors:

color(white)(.....)20y = color(blue)(2xx2)color(white)(.............) xx5 xxy
color(white)(.....)36x = color(blue)(2xx2)xx3xx3color(white)(................) xx x

" "GCF = color(blue)(2xx2) = 4

" "LCM = 2xx2xx3xx3xx5xx y xx x = 180xy

NOte that for the LCM we need all the factors, but without duplicates.

For the GCF, we include all the factors they have in common and multiply them together.

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