Please, I need help fast! n²-4-n-2 is equal to
A) (n-2)n
B) (n-2)(n+1)
C) (n+2)(n-3)
D) (n+2)n

And please write good explanation, not only the answer. Thank you!

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 :)

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

1. supplementary angles

2. acd and bcd

step-by-step explanation: