Respuesta :

Answer:

? = 3ab^2

for  the sum of (-6ab^2) and 3ab^2

Step-by-step explanation:

2ab^2 +(-5ab^2) =(-6ab^2)  +  ?

-3ab^2 = -6ab^2 +  ?

? = 6ab^2 - 3ab^2

? = 3ab^2