Solve the following

Question

I am not sure if I did this correct
(n-5)^2= 20
n-5=+/- 20
n=5+/- sqrt 20

Thanks

yes on the final answer. On the second line, you forgot to type sqrt before 20.

You can reduce it some....sqrt20= sqrt(4*5)= 2 sqrt5

Thanks Bobpursley