Respuesta :

Answer:

4xy

Step-by-step explanation:

20x^2 y  = 4*5 x^2 y = 2*2*5*x*x*y


16*x*y^2 = 4*4*x*y^2 = 2*2*2*2*x*y*y

what is common in both

2*2*x*y

4xy