Respuesta :

remember
[tex](a^b)^c=a^{bc}[/tex]
(ab)(cd)=abcd
[tex](x^m)(x^n)=x^{m+n}[/tex]
so

[tex](5x^3)(2x)^3=(5)(x^3)(2^3)(x^3)=(5)(8)(x^3)(x^3)=40x^6[/tex]
C is answer
Remember

(ab)(cd)=abcd

so


C is answe