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

x= -91V(-9)2 - 4(1)(-20) over
2(1)
x= 9:V(- 9)? – 4(1)(20) over
2(1)
x = 9:V(- 9)2 – 4(1)(-20) over
2(1)
x= -9+7 (-9)+ 4(1)(-20) over
2(1)

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126