combining like terms (subtracting)

-5n^{2}-16

combining like terms (subtracting)

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-5n^{2}-16

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## Comments

First you distribute the minus sign into the terms in the second set of parenthesis:

3n

^{2}-4n+1-8n^{2}+4n-17Then you group the n's together by power:

3n

^{2}-8n^{2}-4n+4n+1-17Then you combine the terms for each:

(3-8)n

^{2}+(-4+4)n+(1-17)Once you do the addition/subtraction for each term you end up with the answer:

-5n

^{2}-16