Respuesta :

texaschic101
Example :
5 + 10
GCF is 5

(5 * 1) + (5 * 2) = 5(1 + 2)

The GCF in the other sum ?.....there is none because it has already been factored

example :
15 + 45
GCF = 15

(15 * 1) + (15 * 3) = 15 (1 + 3)