Respuesta :

(-x^3+3x^2+3)+(3x^2+x+4)=
-x^3+3x^2+3+3x^2+x+4=
-x^3+(3+3)x^2+x+7=
-x^3+6x^2+x+7

Answer: Option C. -x^3+6x^2+x+7
penfila11Pen
Hey there :)

( - x³ + 3x² + 3 ) + ( 3x² + x + 4 )

Remove the brackets and Combine like-terms
- x³ + 3x² + 3 + 3x² + x + 4
- x³ + 3x² + 3x² + x + 3 + 4
- x³ + 6x² + x + 7

Your answer will be [tex]\boxed {Option \ C }[/tex]