Respuesta :

feldragon5

Answer:

5x^2+x+1

Step-by-step explanation:

[tex] {4x}^{2} + x - 8 + {x}^{2} + 9 \\ {4x}^{2} + {x}^{2} + x - 8 + 9 \\ {5x}^{2} + x + 1[/tex]