Respuesta :

Answer: 10x+13x+5

Step-by-step explanation:

Answer:

Step-by-step explanation:

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

-2x + 15x = 13x

9 - 4 = 5

Put these together. Don't do any more than putting them together in a string.

Answer: 10x^2 + 13x + 5