Respuesta :

= -30a^5b + 12a^4b^3 + 6a^3b^2 + 10a^3b^2 - 4a^2b^4 - 2ab^3
= -30a^5b + 12a^4b^3 + 16a^3b^2 - 4a^2b^4 - 2ab^3

answer
B.  -30a^5b + 12a^4b^3 + 16a^3b^2 - 4a^2b^4 - 2ab^3