Hey there!
This can be written as

This is in form of

, it can be expanded as
=> (n-7)(n+7)=0
=> n -7 = 0 or n + 7 = 0
=> n = 7 or n = -7
So option 7 , -7 are correct.
Hope this is clear :)
Have a good day:)
Answer=5/16 or 0.3125 feet
Step-by-step explanation:
7 1/5 - 2 3/5 =
36/5 - 13/5 =
23/5 or 4 3/5 <==
Step-by-step explanation:
whaaaaaat ........how do we know that