I can’t figure this out. Help is greatly needed

3x^3 - 2x^2 + 10x - 12

Step-by-step explanation:

you will just add those terms together

B

Step-by-step explanation:

(f+g)(x) means f(x)+g(x), so you would just do 3x^3-2x^2+4x-5+6x-7.

You don't need to distribute the plus sign because it does nothing to 6x-7.

3x^3- stays constant due to no like terms

-2x^2- stays constant due to no like terms

4x+6x=10x

-5-7=-12

So it would be:

3x^3-2x^2+10x-12