Answer:
x=6
Step-by-step explanation:
(whole secant) * (external part) = (tangent)^2
(9+3) * 3 = x^2
12*3 = x^2
36 = x^2
6 = x
x = 6
x^2 = 3(12) Tangent Secant Product
x^2 = 36
Hope this helped!
