haleywillames123 haleywillames123
  • 24-10-2018
  • Mathematics
contestada

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

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youadorezee
youadorezee youadorezee
  • 24-10-2018

-24n2+31 if im correct!

Answer Link
lisboa lisboa
  • 19-06-2019

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]

Answer Link

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