Question

(4n-1)^2=16

Answer 1

(4n-1)^2 = 16

Get the squareroot of both sides:
4n - 1 = +/- 4

(+):
4n - 1 = 4
4n = 5
n = 5/4

(-):
4n - 1 = -4
4n = -4 + 1
n = -3/4

hope this helps~ `u`