Question

Plz answer this question guys

Answer 1

Answer:

Step-by-step explanation:

$n^{2}$+9n+20=0

$n^{2}$+4n+5n+20=0

n(n+4)+5(n+4)=0

n= -4, n= -5

$n^{2}$+1=not any of the option

so answer is (4)