Answer:
-1 and -3
(n+7)(n-8)
Step-by-step explanation:
1. Find the Zeros
[tex]f(x)=x^{2} +4x+3[/tex]
[tex]f(x)=\left(x+1\right)\left(x+3\right)[/tex]
[tex]x+1=0\\x=-1\\x+3=0\\x=-3[/tex]
2. Factoring Trinomials
[tex]f(x)=n^{2} -n-56[/tex]
[tex]f(x)=\left(n+7\right)\left(n-8\right)[/tex]
[tex]n+7=0\\n=-7\\n-8=0\\n=8[/tex]
