Need asap what are the restrictions of: (n^2 -6) / (n^2 -2) 5 and 2 +/- sqrt5 and +/- sqrt2 5 and -2

What you should see for this case are the values for which the denominator is NOT defined.
 We have then that in this case the values are:
 (n ^ 2 -2) = 0
 Clearing n we have:
 (n ^ 2) = 2
 n = + / - sqrt (2)
 
 the restrictions are:
 n = + / - sqrt (2)

Bis the correct answer