Answer:
[tex]-24n^2 + 31[/tex]
Step-by-step explanation:
[tex]7 - 3[(n^3 + 8n) divide (-n) + 9n^2][/tex]
To simplify it we use order of operation PEMDAS
Parenthesis , exponents , multiply, divide, add and subtract
[tex]7 - 3[(n^3+ 8n) divide (-n) + 9n^2][/tex]
LEts start with parenthesis (divide by -n)
[tex]7 - 3[-n^2-8+ 9n^2][/tex]
Now we simplify the parenthesis by combining like terms
[tex]7 - 3[-8+8n^2][/tex]
multiply by -3
[tex]7+24 -24n^2[/tex]
[tex]-24n^2 + 31[/tex]
