x+y = -19
x*y = 35
x=-19-y
(-19-y)y = 35
y^2 +19y +35 = 0
y = -2.066965626
therefore x=35/y = -16.93303437
Answer and workings are in the attachments below.
First, enter the variables into the expression.
Square 1/3 and -6 to get this:

Divide 36 by 2/3:

Subtract 54 from1/9 to get the final answer:

, which is option D.
Hope this helps!
When two chords of a circle intercept, the products of the segments are equal, that is, PT*QT=RT*ST
6*4=RT*10
RT=2.4