Respuesta :

mkampi430

Answer:

3x^2 - 10x - y

Step-by-step explanation:

2x - 8y + 3x^2 +7y -12x

can not combine unlike terms so 3x^2 stays alone

2x - 12x = -10 x

-8y +7y = -y

3x^2 - 10x - y