## Algebra: A Combined Approach (4th Edition)

$3n^2+20n+5$ Factors of 5: 1 and 5, -1 and -5 Factors of 3: 1 and 3, -1 and -3 Since there are no negative coefficients, we will ignore the negative pairs for the factors. $(3n+1)(n+5)$ $3n*n+3n*5+1*n+5*1$ $3n^2+15n+n+5$ $3n^2+16n+5$ $(3n+5)(n+1)$ $3n*n+3n*1+5*n+5*1$ $3n^2+3n+5n+5$ $3n^2+8n+5$