Respuesta :

kaykay9996
63+15=3×(21+5)
The prime factors of
63
are
3
×
3
×
7

and those of
15
are
3
×
5

As only
3
is common, GCF is
3

and as such
63
+
15
can be written as
63
+
15
=
3
×
21
+
3
×
5
=
3

Answer:

Step-by-step explanation:

3