Respuesta :

ja06814

Answer:

3x^2+2x+8

Step-by-step explanation:

1. x^2+2x^2=3x^2

2. -3x+5x=2x

3.1+7=8

Answer:

3x^2+2x+8

Step-by-step explanation:

You just add the values if it were subtraction then you would distribute the negative.