Check the picture below.
we could also look at it from the inscribed angle theorem, bearing in mind that the intercepted arc is 180°.
t³-t²-2t/t -5 )/(t²-t-2)
(t^4-t^3-7t)/t^3-t^2-2t)
(t³-t²-7)/(t²-t-2)
I hope that's help !
x - 14 would be the equation
Does this help? Not really sure what you are asking.