Which equation has the components of 0 = x2 - 9x - 20 inserted into the quadratic formula correctly? x = x = x = x =

To solve the quadratic equation given by 0=x^2-9x-20, we use the quadratic formula given by:

x=[-b + / - sqrt (b^2-4ac) ] / (2a)

where,

a=1, b=-9, c=-20

thus substituting the above values into our formula we get:

x=[9+/-sqrt (9^2-4 (-20*1)) / (2*1)

x=[9+/-sqrt (161) ]/2

x=[9+sqrt161]/2 or x=[9-sqrt161]/2