Respuesta :

Answer:

The answer is 7x² + 2x – 1

Step-by-step explanation:

(7x² – 5x + 3) + (2² + 7x – 8)

7x² – 5x + 3 + 4 + 7x – 8

7x² + 2x – 1

Thus, The answer is 7x² + 2x – 1

-TheUnknownScientist 72