Respuesta :

88nikita

Answer:

10x^2 + 5x + 2

Step-by-step explanation:

since you're adding, you can take out the parenthesis

9x^2 - 7x + 4 + x^2 + 12x - 2

combine like terms:

10x^2 + 5x + 2

liono56
Answer: (9x2 - 7x + 4) + (x2 + 12x - 2)
(18 - 7x + 4) + (x2 + 12x - 2)
(22 - 7x) + (14x - 2)
22 - 7x + 14x - 2
= 20 + 7x