Respuesta :

Answer:

[tex]b - {5b}^{9} - 8[/tex]

Step-by-step explanation:

1) Use product rule.

[tex]b - 5b ^{8 + 1} - 8[/tex]

2) Simplify 8 + 1 to 9.

[tex]b - {5b}^{9} - 8[/tex]

Therefor, the answer is b - 5b - 8.