Respuesta :
Answer:
(12+3x)x
Step-by-step explanation:
1- 12x+3x 15x
2- 12x+3x 15x
3- 13x+4x 17x
4- 15x
All are equivalent except for (12 + 3x)x
EXPLANATION
(12 + 3x)x ends up being an exponential value while the rest simplify out to 15x
EXPLANATION
(12 + 3x)x ends up being an exponential value while the rest simplify out to 15x