(n-1)^2 = 5
n-1 = ±√5
n = 1±√5
Solve the equation and write the answer in simplified radical form.
n^2 - 2n + 1 = 5
2 answers
n^2 - 2 n - 4 = 0
n = [ 2 +/- sqrt(4 + 16) ] / 2
n = [ 2 +/- 2 sqrt 5 ]/2
n = 1 +/- sqrt 5
n = [ 2 +/- sqrt(4 + 16) ] / 2
n = [ 2 +/- 2 sqrt 5 ]/2
n = 1 +/- sqrt 5