Answer:
C. (n+2)(n-3)
Step-by-step explanation:
n^2 - 4 - n - 2 = n^2 - n - 6
n = (-(-1) ± √(-1)^2 - 4(1)(-6))/(2(1)) = (1 ±√25)/2 = 6/2 or = -4/2
therefore, n = 3 or n = -2
therefore, n^2 - n - 6 = (n+2)(n-3)
This is a question on solving quadratic equations using a kind of formula. If you wish to venture further into it/understand this topic better, you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)
