Respuesta :

ktreyb
x³(- 9x - 7) - 4x⁴

Distribute the x³:
- 9x⁴ - 7x³ - 4x⁴

Combine like terms:
- 13x⁴ - 7x³

Remove a common factor in x³ for your answer(s):
x³(- 13x - 7)
or
- x³(13x + 7)