Respuesta :

mariahmendez
The answer to this question is 252a^7+80a^6+7a^5
7a^3(6a^2+a)^2-4a^6
7a^3(36a^4+12a^3+a^2)-4a^6
252a^7+84a^6+7a^5-4a^6
252a^7+80a^6+7a^5


I hope this helps!!!!!!!!!!!

Answer: B 252a^7+80a^6+7a^5

Step-by-step explanation: I just took the test