Question

What would be the answer to this?

Answer 1

D

Explanation:

Distribute the negative 1 in the second group.

`5k^4*-1=-5k^4 \\ 5k^3*-1=-5k^3 \\ -k*-1=k`

Now add by combining like terms.

`3k^4-5k^4=-2k^4 \\ -2k^3-5k^3=-7k^3 \\ k+k=2k`

`-2k^4-7k^3+2k`