Answer :
(N-7)(n+2)=0 as you'd get n^2-7n+2n-14 then just simplify. Then it would be n=-2 or 7
[tex]n^2-5n-14=0 \\
n^2-7n+2n-14=0\\
n(n-7)+2(n-7)=0\\
(n+2)(n-7)=0\\
n=-2 \vee n=7[/tex]