Question

Ubtract -2k3 + k2 - 9 from 5k3 - 3k + 7.

Answer 1

7k3 - k2 - 3k + 16.

Explanation:

5k3 - 3k + 7 - (-2k3 + k2 - 9)

First distribute -1 over the parentheses:

= 5k3 - 3k + 7 + 2k3 - k2 + 9

Now simplify like terms:

= 7k3 - k2 - 3k + 16 (answer).

Answer 2

Answer:
`7k^(3)-k^(2) -3k+16`

Explanation:

1. You have the following expression:

`5k^(3) -3k+7-(-2k^(3)+k^(2)-9)`

2. Distributive the negative sign that is in front of the parentheses:

`5k^(3) -3k+7+2k^(3)-k^(2)+9`

3. Now, you must add like terms, then you obtain the following result:

`7k^(3)-k^(2) -3k+16`