Find the roots. List the correct steps

f (n) = n^2 - 6n - 16

n_1 = 8

n_2 = - 2

Step-by-step explanation:

D = b^2 - 4ac (where f (x) = ax^2 + bx + c)

D = - 6^2 - 4*1*-16

D = 36 + 64 = 100

n_1, n_2 = (-b + -sqrt (D)) / (2a)

n_1, n_2 = ( - (-6) + -sqrt (100)) / (2*1)

n_1, n_2 = (6 + - 10) / 2

n_1 = (6 + 10) / 2 - > 16/2 = 8

n_2 = (6 - 10) / 2 - > - 4/2 = - 2