Answer:
Answer = -2x^2 + 5x - 9
Step-by-step explanation:
First add the x^2 terms :
> x^2 - 4x^2 + x^2
> - 3x^2 + x^2
> -2x^2
Then add the x terms :
> 9x - 3x - x
> 6x - x
> 5x
Then lastly add the last terms :
> -7 + 1 - 3
> -6 -3
> -9
= -2x^2 + 5x -9
