Respuesta :
Answer:
B and C
Step-by-step explanation:
A is the product of -2x and 4x which is -8x^2
B is the product of 3 and 4x which is 12x
C is the product of -2x and 1 which is -2x
D is the product of 3 and 1 which 3
The only like terms are 12x in B and -2x in C.
Answer: B and C