Question 33668
Solve:
{{{N^2 - 6 = 0}}} Add 6 to both sides.
{{{N^2 = 6}}} Take the square root of both sides.
N = (+-) {{{sqrt(6)}}} 

{{{(n-5)^2 = 20}}} Take the square root of both sides.
n-5 = (+-) {{{sqrt(20)}}} Simplify the right side and add 5 to both sides.
n = 5(+-){{{2sqrt(5)}}}