Question

Simplify the following expression in your notebook. Select the correct answer.

7 - 3[(n 3 + 8n) ÷ (-n) + 9n 2]

-24n2 + 31
n3 - 24n2 + 31
9n2 - 24n + 7
21n + 31

Answer 1

-24n2+31 if im correct!

Answer 2

`-24n^2 + 31`

Explanation:

`7 - 3[(n^3 + 8n) divide (-n) + 9n^2]`

To simplify it we use order of operation PEMDAS

Parenthesis , exponents , multiply, divide, add and subtract

`7 - 3[(n^3+ 8n) divide (-n) + 9n^2]`

LEts start with parenthesis (divide by -n)

`7 - 3[-n^2-8+ 9n^2]`

Now we simplify the parenthesis by combining like terms

`7 - 3[-8+8n^2]`

multiply by -3

`7+24 -24n^2`

`-24n^2 + 31`