Respuesta :

Answer:

10x^2 +2x -9

Step-by-step explanation:

Group things that are alike and simplify

(3x^2+7x^2) = 10x^2

(2x) nothing to add or subtract with it so it stays positive 2x= +2x

(-5-4) = -9

Then put the answer from highest degree to lowest

daylaindanial29
That I’d right that’s what I got