## Algebra 2 (1st Edition)

$$\pm8$$
Here, we see that the factors must multiply to get $7$ and add to get $b$. The only factors of 7 are $-1\ and\ -7$ and $1\ and\ 7$. Thus, the only values of b that work are: $$-1-7=-8 \\ AND \\ 1+7=8$$