Respuesta :

x^2 - 5x - 8 - 2x^2 + 4x + 3
= -x^2 - x - 5 

hope that helps
(x²-5x-8)-(2x²-4x-3)

> x²-5x-8-2x²+4x+3

> x²-2x²-5x+4x-8+3

>-x²-x-5


Hope This Helps!