How do you write the sum of the number 63+15 as the product of their GCF and another sum?

1 Answer
Shwetank Mauria
Oct 18, 2016

#63+15=3xx(21+5)#

Explanation:

The prime factors of #63# are #3xx3xx7#

and those of #15# are #3xx5#

As only #3# is common, GCF is #3#

and as such #63+15# can be written as

#63+15=3xx21+3xx5=3xx(21+5)#

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