Respuesta :

Answer:

7x^2 + 2x - 5

Step-by-step explanation:

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

7x^2 + 2x - 5

Pretty simple, just add 4 and 3, then x (or 1) and x, lastly -9 and 4. Then you get your final equation.