Hello, can you help me explain the steps that I did? I don't know how to explain this very detailed! like other people. This is Calculus by the way.

\f2 5 ( - 3 x 242+ 15) 25 (u - 5 ) - 3 u 242 + 15 5 ( x - 5 ) - 3u - 42 + 15 5/ uh -5) domain Checking demoninator 5 ( 2 - 5)2 of we Put in m it makes it 2evo 5 ( +15 ) = O.35 7/2 - 1 33 21 2 - 1 5 9/ 2 35 33 2 Odivative is Same from both. 3 equation . of line tangent to the function : flu ) = Fix- an at n-1. we find derivative. f (w) = Fu _ 2u = 7.2 n - 2Puting 1 in earvation, = 14(1 ) - 2 = 14- 2 = 12 Slope of tangent line at n = 1 is 12. NOW find 9 - coordinates flu ) = Tut - zu fli ) = 7 ( 1) - 2(1 ) - 2 5