combining like terms (subtracting) 9/23/2012 | Samantha from Kirkland, WA | 1 Answer | 0 Votes Mark favorite Subscribe Comment

-5n^{2}-16 9/23/2012 | Travis A. Comment Comments First you distribute the minus sign into the terms in the second set of parenthesis: 3n^{2}-4n+1-8n^{2}+4n-17 Then you group the n's together by power: 3n^{2}-8n^{2}-4n+4n+1-17 Then 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 9/23/2012 | Travis A. Comment

First you distribute the minus sign into the terms in the second set of parenthesis: 3n^{2}-4n+1-8n^{2}+4n-17 Then you group the n's together by power: 3n^{2}-8n^{2}-4n+4n+1-17 Then 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 9/23/2012 | Travis A.

## 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