Respuesta :

Answer:

-8x^2+3x-6

Step-by-step explanation:

(-4x^2+ 3x + 3) - (4x^2 +9)

Distribute the minus sign

(-4x^2+ 3x + 3) - 4x^2 -9

Combine like terms

-8x^2+3x-6

I think the answer is 3x-6