(* Authors: Albert Qiaochu Jiang *) theory mathd_algebra_13 imports Complex_Main begin theorem mathd_algebra_13: fixes a b :: real assumes h0: "\(x::real). (x-3 \ 0 \ x - 5 \ 0) \ 4 * x / (x^2 - 8 * x + 15) = a / (x-3) + b / (x-5)" shows "a = -6 \ b = 10" sorry end