Respuesta :

Wallind11

Answer:

[tex]84 {x}^{12} \: [/tex]

Option C

Step-by-step explanation:

[tex](4x)( - 3 {x}^{8} )( - 7 {x}^{3} )[/tex]

[tex](4x)(21 {x}^{8 + 3} )[/tex]

[tex]84 {x}^{1 + 11} [/tex]

[tex]84 {x}^{12} [/tex]